Automotive Skills Practice Plan
Build hands-on automotive repair experience using cheap junk parts on the workbench — low stakes, high learning value. Practice torquing, stripping, and repairing threads before ever touching a real vehicle.
Philosophy: It’s much better to learn what a stripped thread feels like on a $15 junkyard cylinder head at your workbench than on the car you need to drive to work on Monday.
Why Practice on Junk Parts?
- Learn the feel of proper torque vs approaching failure — this can’t be learned from reading
- Make mistakes safely — strip threads, snap bolts, over-torque on purpose
- Build muscle memory with repair techniques before the pressure of a real job
- Test your tools — verify torque wrenches (calibration method), breaker bars, extractors on real materials
- Father-son learning project — teaches mechanical skills, metallurgy, and problem-solving
Junk Parts Shopping List
Source these from a local pull-a-part yard, Facebook Marketplace, Craigslist free section, or garage sales. Target budget: $50-75 for a full practice set.
Priority Parts
| Part | Why It’s Great Practice | Est. Cost | Skills Covered |
|---|---|---|---|
| Aluminum cylinder head | #1 helicoil target in real life; soft threads strip easily | $10-30 | Thread repair, torque sequence, helicoils |
| Brake caliper + bracket | Mix of bolt sizes, cast iron + aluminum | $5-15 | Torque practice, slide pin bolts, bleeder screws |
| Intake or exhaust manifold | Studs, different thread pitches, heat-seized fasteners | $10-20 | Stud removal, manifold bolt torque patterns |
| Wheel hub + rotor | Lug nut practice, rust, large fasteners | $5-10 | Lug nut torque, rotor screw removal |
Nice to Have
| Part | Why | Est. Cost |
|---|---|---|
| Misc. brackets and flanges | Small bolt practice, odd angles | Often free |
| Old valve cover | Gasket surface practice, small bolt torque patterns | $5-10 |
| Transmission pan | Bolt pattern torque sequence, gasket surface prep | $5-10 |
| Any cast aluminum part | Aluminum is where thread damage happens most | Varies |
Where to Source
- Pull-a-part / junkyard — Best value; most charge by the part; some have “fill a bucket” days
- Facebook Marketplace “free” section — People giving away old engines/parts they want hauled away
- Craigslist free section — Same as above
- Garage sales / estate sales — Occasionally have old parts lots
Skills Practice Curriculum
Level 1: Torque Fundamentals
Goal: Develop a feel for proper torque and understand what “too tight” feels like.
Exercises:
- Torque to spec — Set torque wrench to various values, torque bolts, verify with calibration method
- Torque sequence practice — Follow a cylinder head torque pattern (multiple passes, increasing torque)
- Learn the “feel” — Torque a bolt by hand, guess the torque, then verify with wrench
- Breaker bar removal — Practice proper technique: steady pressure, correct angle, body positioning
Level 2: Intentional Destruction
Goal: Learn what failure feels like so you can recognize the warning signs on a real car.
Exercises:
- Over-torque until failure — Slowly increase past spec until the bolt snaps or threads strip
- Strip aluminum threads on purpose — Feel the transition from “tight” to “oh no”
- Snap a bolt — Understand the difference between a bolt stretching vs breaking
- Cross-thread a bolt — Learn what cross-threading feels like so you never do it by accident
- Compare materials — Strip threads in aluminum vs cast iron vs steel to feel the difference
Level 3: Thread Repair Techniques
Goal: Master the common thread repair methods before you need them under pressure.
Helicoil / Thread Insert Installation
The most common thread repair in automotive work. Practice this until it’s routine.
Kit needed: Helicoil or similar thread insert kit (~$15-30 for a common size set)
Steps to practice:
- Strip a thread in the aluminum cylinder head (Level 2 exercise)
- Drill out the damaged thread to the specified oversize
- Tap the new threads using the kit’s tap
- Install the thread insert
- Test by torquing a bolt into the repaired hole to spec
- Repeat until confident
Drilling Out Broken Bolts
Tools needed: Screw extractor / easy-out set (~$10-20), center punch, drill bits
Steps to practice:
- Snap a bolt in a threaded hole (Level 2 exercise)
- Center punch the broken bolt
- Drill a pilot hole — this is the hardest part; practice centering
- Use a screw extractor to back out the remains
- Chase the threads with a tap
- Practice the failure mode too — easy-outs can break inside the hole, making things worse. Learn what too much force feels like
Tap and Die Work
Tools needed: Tap and die set (~$20-40 for a basic set)
Skills to practice:
- Thread chasing — Cleaning up damaged but salvageable threads (use a tap with light pressure)
- Re-tapping — Cutting new threads in a damaged hole (more aggressive)
- Knowing the difference — A chaser cleans; a tap cuts. Using a tap when you need a chaser removes material unnecessarily
- Die work — Cleaning up damaged bolt threads
- Thread pitch identification — Practice identifying metric vs SAE, fine vs coarse
Advanced: Time-Serts
More robust than helicoils (solid insert vs coiled wire). Higher cost per repair but stronger result.
When to use over helicoils:
- High-stress applications (head bolts, spark plug holes)
- Where the repair must be as strong or stronger than original
- Repeated repair of same hole
Level 4: Realistic Scenarios
Goal: Simulate real-world conditions.
Exercises:
- Seized bolt practice — Soak bolted-up parts in salt water for 1-2 weeks, then practice removal with penetrating oil (PB Blaster, Kroil) and heat
- Awkward angles — Clamp parts in odd positions to simulate working under a car
- Blind holes — Practice where you can’t see the threads (feel only)
- Heat application — Use a propane torch to break seized fasteners (practice on the workbench, not under a car with fuel lines)
Tools Needed for Practice
Most of these are tools you’ll want in the garage anyway. The practice parts justify buying them now — and practicing on junk is the ideal time to discover whether a cheap tool earns an upgrade.
Purchasing Philosophy Applied
Every tool below falls into the standard “Buy Cheap, Upgrade When Proven” track per the Tool Purchasing Philosophy. None are safety-critical or precision instruments — they’re bench tools used on junk parts. This is the ideal scenario for budget-first purchasing: you’ll learn what matters to you before spending real money.
Already on Hand
These are already owned or planned per other vault documents — no additional purchase needed.
| Tool | Source | Status | Notes |
|---|---|---|---|
| Torque wrenches (1/2” + 1/4”) | Torque Wrench Selection | Planned purchase | Icon or TEKTON + GearWrench — needed for Level 1 exercises |
| Breaker bars | General inventory | Owned | Level 1 removal practice |
| Socket sets | General inventory | Owned | Used throughout all levels |
| Bench vice | General inventory | Owned | Secures parts for all exercises |
| Drill (Makita cordless) | Interior Finishing Tool List | Owned | Adequate for aluminum; see drill bit notes below |
| Heavy-duty corded drill (Craftsman) | Interior Finishing Tool List | Owned | Better for drilling out broken bolts — more torque, steadier speed |
| Safety glasses | Interior Finishing Tool List | Owned | Mandatory for drilling, grinding, torch work |
| Full face shield | Interior Finishing Tool List | Owned | Use during torch and extraction work |
| Full face respirator (3M) | Interior Finishing Tool List | Owned | For penetrating oil in enclosed spaces |
| Work gloves | Interior Finishing Tool List | Owned | Heat-resistant pair recommended for torch exercises |
Tools to Purchase — Detailed Selection
1. Helicoil / Thread Insert Kit
Used in: Level 3 (Thread Repair Techniques), and eventually on the Corvette restoration.
| Tier | Product | Price | Notes |
|---|---|---|---|
| Budget | Amazon/eBay generic 88-piece helicoil kit (M6-M10 + common SAE) | ~$15-25 | Includes drill bits, taps, insertion tools, and coil inserts for several sizes. Quality varies — some taps are soft. Perfect for learning the process on junk. |
| Budget+ | Heli-Coil brand individual size kit (e.g., 5/16-18, 3/8-16) | ~$15-25 per size | Genuine Heli-Coil taps cut cleaner threads. Buy per-size as you learn which sizes you actually use. |
| Premium | Time-Sert kit (per size) | ~$50-80 per size | Solid insert vs coiled wire — stronger, more permanent. Justified for head bolts, spark plug holes, high-stress applications on the actual Corvette. |
Recommendation: Start with a generic assorted kit (~$20) for practice. The cheap taps work fine in junk aluminum. When you’re doing a real repair on the Corvette, buy individual genuine Heli-Coil or Time-Sert kits in the exact size you need.
Upgrade trigger: If the cheap kit’s tap dulls mid-thread or inserts won’t seat cleanly, that’s a kit quality issue — upgrade to genuine Heli-Coil for that size.
C3 Corvette Context
The ‘76 Corvette small-block Chevy uses SAE fasteners almost exclusively. Common helicoil sizes you’ll eventually want: 5/16-18, 3/8-16, 3/8-24, 7/16-14. Spark plug holes are 14mm (one of the few metric threads on the engine). Make sure your practice kit includes SAE sizes — cheap combo kits often skew metric.
- Purchase helicoil insert kit (generic assorted for practice) — stage:: 5
2. Screw Extractor / Easy-Out Set
Used in: Level 3 (Drilling Out Broken Bolts). One of the most-used emergency tools in any restoration.
| Tier | Product | Price | Notes |
|---|---|---|---|
| Budget | Pittsburgh 6-piece spiral screw extractor set (Harbor Freight) | ~$8-12 | Spiral-flute style grips better than straight-flute. Covers 1-6 (fits 3/16” to 5/8” bolts). HF lifetime warranty. |
| Budget+ | Irwin Hanson 5-piece spiral extractor set | ~$15-20 | Better steel, less likely to snap in hardened bolts. Available at most hardware stores. |
| Premium | Snap-on or Bosch cobalt extractors | ~$30-50 | Hardened steel resists snapping in seized bolts. Only justified if you’re breaking budget extractors regularly. |
Recommendation: Pittsburgh spiral set from Harbor Freight (~$10). Extractors either work or they snap — technique matters more than brand. The spiral (left-hand flute) style is universally preferred over straight-flute because the cutting action helps loosen the bolt as you turn.
Upgrade trigger: If you’re breaking extractors in the junk parts, it’s almost certainly a technique issue (hole too small, too much force, not enough penetrating oil). Practice more before upgrading. If extractors snap in hardened real-world bolts, buy individual Irwin cobalt extractors in the size you need.
Practice the Failure Mode
A broken extractor stuck inside a broken bolt is the worst-case scenario — hardened tool steel that can’t be drilled out easily. Level 3 exercises deliberately include this failure so you learn the limits of force. Better to break an 40 one in the Corvette.
- Purchase screw extractor set (Pittsburgh spiral, Harbor Freight) — stage:: 5
3. Tap and Die Set (SAE + Metric)
Used in: Level 3 (Tap and Die Work, Thread Chasing). Essential for any restoration — you’ll chase damaged threads constantly.
| Tier | Product | Price | Sizes | Notes |
|---|---|---|---|---|
| Budget | Pittsburgh 40-piece SAE & Metric set (Harbor Freight) | ~$30-40 | Common coarse + fine threads, both SAE and metric | Carbon steel taps — adequate for aluminum and cast iron. Will dull faster in steel. Includes tap handle and die stock. |
| Budget+ | TEKTON 39-piece SAE & Metric set | ~$50-70 | Broader size range, includes thread pitch gauge | Alloy steel taps, better quality finish. Organized case. |
| Mid-Range | Irwin Hanson 66-piece SAE & Metric set | ~$80-120 | Comprehensive coverage, bottoming + taper taps | High-carbon steel, professional-grade. Excellent for long-term use. |
Recommendation: Pittsburgh 40-piece set (~$35) for practice. Cheap taps teach you the technique — proper lubrication, quarter-turn-and-back rhythm, feel for chip clearing. The taps will dull eventually, which is itself a learning experience (recognizing a dull tap before it snaps).
Upgrade trigger: When you start doing real thread chasing on the Corvette, buy individual high-quality taps (Irwin, Vermont American, or OSG) in the specific sizes you use most. Individual quality taps are $5-10 each — far better than upgrading the whole set.
C3 Corvette Context
The ‘76 small-block Chevy is overwhelmingly SAE. Sizes you’ll chase most often: 1/4-20, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20. Coarse (UNC) for body and brackets, fine (UNF) for engine and drivetrain. Make sure your set covers these — cheap combo sets sometimes skip the fine-thread SAE sizes. The metric exception is spark plug threads (14mm × 1.25).
- Purchase tap and die set (Pittsburgh 40-pc SAE+Metric, Harbor Freight) — stage:: 5
4. Center Punch
Used in: Level 3 (Drilling Out Broken Bolts). Critical for keeping the drill centered — a wandering pilot hole makes extraction impossible.
| Tier | Product | Price | Notes |
|---|---|---|---|
| Budget | Pittsburgh automatic center punch (Harbor Freight) | ~$5-8 | Spring-loaded — press down and it fires. More consistent than hitting a manual punch with a hammer, especially on a broken bolt stub where the surface is uneven. |
| Budget+ | Starrett 18A automatic center punch | ~$20-30 | Adjustable spring tension, hardened tip. Worth it only if you’re doing precision layout work regularly. |
Recommendation: Pittsburgh automatic center punch (~$6). The spring-loaded mechanism is more consistent than a manual punch-and-hammer, and consistency is what matters when centering on a broken bolt. This is a “buy cheap and it lasts forever” tool.
Upgrade trigger: Unlikely. A center punch is a hardened point on a spring. The cheap one works indefinitely.
- Purchase automatic center punch (Pittsburgh, Harbor Freight) — stage:: 5
5. Drill Bits (Two-Set Strategy)
Used in: Level 3 (Drilling Out Broken Bolts, Helicoil Installation). Two different needs call for two different sets — expendable bits for practice and the garage build, and cobalt bits kept sharp for when material hardness demands them.
| Role | Product | Price | Sizes | Notes |
|---|---|---|---|---|
| Daily driver (practice + garage build) | Warrior 29-piece titanium-coated set (Harbor Freight) | ~$12-18 | 1/16” to 1/2” in 1/64” increments | TiN coating helps in aluminum and mild steel. Use these for everything — framing, electrical, junk parts practice. They’ll dull, and that’s fine. Replace the whole set when enough bits are gone (~$15). |
| Hard metal reserve | Milwaukee RED HELIX Cobalt 23-piece set (48-89-2338) | ~$75 | 1/16” to 3/8” (23 bits with duplicates of common small sizes) | Cobalt steel rated for stainless, cast iron, and hardened metals. 135° split point won’t walk on broken bolt stubs. QUAD EDGE tip with four cutting edges for faster removal and less heat. Variable helix flute clears chips aggressively. Up to 15× life vs black oxide. PACKOUT-compatible case. |
Two-set strategy: The Warrior set is your workhorse — grab it for any drilling task without thinking twice. The Milwaukee Cobalt set stays in the drawer, sharp and ready, for the moments when you hit hardened steel that the Warrior bits bounce off of. This avoids the mid-task trip to the store when you’re knuckle-deep in a broken bolt extraction on the Corvette.
Why buy the cobalt set upfront instead of per-bit? At ~3.25) is competitive with buying individual cobalt bits ($5-10 each), and you get the right size immediately instead of discovering you need a 13/64” cobalt bit at 8 PM on a Saturday. The set also includes duplicate bits in the most-used small sizes (1/16”, 5/64”, 7/64”, 1/8”, 9/64”, 5/32”, 3/16”, 1/4”) — exactly the sizes you burn through during bolt extraction work.
What the cobalt set doesn’t cover: The Milwaukee set tops out at 3/8”. The Warrior set goes to 1/2”. For the rare case where you need a large cobalt bit (unlikely in automotive work), buy an individual bit in that size.
Keeping the Cobalt Set Sharp
The whole point of the two-set strategy is that the cobalt bits stay sharp for when you really need them. Resist the temptation to grab a Milwaukee bit for a quick hole in mild steel — that’s what the Warrior bits are for. Cobalt’s edge retention advantage only matters when cutting hard material.
- Purchase drill bit set (Warrior 29-pc TiN, Harbor Freight, ~$15) — stage:: 5
- Purchase cobalt drill bit set (Milwaukee RED HELIX 23-pc 48-89-2338, Home Depot, ~$75) — stage:: 5
6. Thread Pitch Gauge
Used in: Level 3 (Thread Pitch Identification). Teaches you to identify SAE vs metric, coarse vs fine by matching the gauge leaves against unknown threads.
| Tier | Product | Price | Notes |
|---|---|---|---|
| Budget | Pittsburgh SAE + Metric thread pitch gauge (Harbor Freight) | ~$5-8 | Two-piece set (one SAE, one metric). Stamped steel leaves with pitch markings. Works exactly the same as expensive versions. |
| Budget+ | Mitutoyo or Starrett thread pitch gauge | ~$15-25 | Finer machining, easier to read markings. Only matters for very fine threads or professional metrology. |
Recommendation: Pittsburgh gauge (~$6). A thread pitch gauge is stamped steel leaves — there’s nothing to wear out, break, or go out of calibration. The cheap one works identically to the expensive one for identifying automotive fasteners. This is a “buy cheap and keep forever” tool.
Upgrade trigger: None. You’ll never need to upgrade a thread pitch gauge.
- Purchase thread pitch gauge (Pittsburgh SAE+Metric, Harbor Freight) — stage:: 5
7. Penetrating Oil
Used in: Level 4 (Seized Bolt Practice). Consumable, not a tool — just buy what works.
| Product | Price | Notes |
|---|---|---|
| PB Blaster | ~$8-12 | Industry standard. Available everywhere. Good penetration, strong smell. |
| Kroil | ~$15-20 | Widely regarded as the best penetrating oil. Better capillary action than PB. Harder to find locally — usually ordered online. |
| 50/50 ATF + Acetone (DIY) | ~$5 (materials on hand) | Old mechanic’s trick. Mix automatic transmission fluid with acetone 1:1. Excellent penetrant. Must be mixed fresh — acetone evaporates. Use in a spray bottle, not a pressurized can. Flammable. |
Recommendation: PB Blaster for practice — it’s cheap and available at any auto parts store. For the Corvette restoration, consider Kroil for the worst seized fasteners (exhaust manifold bolts, body mount bolts). The ATF/acetone mix is a legitimate alternative if you have both on hand.
- Purchase penetrating oil (PB Blaster) — stage:: 5
8. Propane Torch
Used in: Level 4 (Heat Application for Seized Fasteners). Also useful for soldering, heat-shrink, and general shop use.
| Tier | Product | Price | Notes |
|---|---|---|---|
| Budget | Bernzomatic TS4000 trigger-start (propane) | ~$25-35 | Trigger-start ignition (no separate lighter needed). Swirl-flame tip for broad heat. Available at Home Depot, Lowe’s, and most hardware stores. Runs on standard 14.1 oz propane cylinders (~$4 each). |
| Upgrade | Bernzomatic TS8000 (MAP-Pro compatible) | ~$40-50 | Runs on MAP-Pro gas (~$10/cylinder) which burns ~600°F hotter than propane. Better for stubborn seized fasteners and larger parts. Also runs on propane for lighter work. |
Recommendation: **Bernzomatic TS4000 (~5 over a manual ignition model — one less thing to fumble when you’re holding a wrench in the other hand.
Upgrade trigger: If you’re applying heat to a seized exhaust manifold bolt on the Corvette and propane isn’t getting the part hot enough fast enough, upgrade to the TS8000 with MAP-Pro gas. The hotter flame makes a real difference on large cast iron parts. The TS8000 also accepts propane cylinders, so you get both options.
Heat Safety on the Workbench
Torch work on junk parts at the bench is far safer than under a car, but still requires attention:
- Clamp parts securely — a loose part that shifts while you’re heating it is a burn risk
- Keep a fire extinguisher within arm’s reach (you already have plenty)
- No penetrating oil + torch simultaneously — PB Blaster is flammable. Apply penetrant, let it soak, wipe excess, then apply heat. Not the other way around
- Aluminum melts at ~1,220°F — propane flame is ~3,600°F. You can melt aluminum junk parts easily. That’s a useful thing to learn on purpose, but not by accident
- Purchase propane torch (Bernzomatic TS4000, trigger-start) — stage:: 5
Practice Tool Budget Summary
| Category | Est. Cost | Notes |
|---|---|---|
| Helicoil insert kit (generic assorted) | $15-25 | Practice set; buy genuine per-size for Corvette work |
| Screw extractor set (Pittsburgh spiral) | $8-12 | HF lifetime warranty |
| Tap and die set (Pittsburgh 40-pc) | $30-40 | SAE + Metric coverage |
| Automatic center punch (Pittsburgh) | $5-8 | Spring-loaded |
| Drill bits — Warrior 29-pc TiN (daily driver) | $12-18 | Expendable; use for practice + garage build |
| Drill bits — Milwaukee RED HELIX Cobalt 23-pc (hard metal reserve) | ~$75 | Keep sharp for hardened steel, bolt extraction, Corvette work |
| Thread pitch gauge (Pittsburgh) | $5-8 | SAE + Metric; lasts forever |
| Penetrating oil (PB Blaster) | $8-12 | Consumable |
| Propane torch (Bernzomatic TS4000) | $25-35 | Trigger-start; reusable for shop work |
| Practice tools total | $183-233 | |
| Junk parts (per shopping list above) | $50-75 | |
| Total to get started | $233-308 | All tools reusable for real Corvette work |
Overlap with Other Planned Purchases
The torque wrenches needed for Level 1 exercises are already planned in Torque Wrench Selection (~$70-170 for both 1/2” and 1/4” drive). That purchase serves both this practice plan and general garage use — it’s not double-counted above.
Corvette Restoration Upgrade Path
As you progress from practice to actual ‘76 Corvette work, expect these targeted upgrades:
| Practice Tool | Corvette Upgrade | When to Buy | Est. Cost |
|---|---|---|---|
| Generic helicoil kit | Genuine Heli-Coil or Time-Sert in specific SAE sizes | When you need a real repair | $15-80 per size |
| Milwaukee Cobalt set (already purchased) | Individual cobalt bits above 3/8” if needed | Unlikely — 1/16”-3/8” covers most automotive work | $8-15 per bit |
| Pittsburgh taps | Individual Irwin/Vermont American taps in high-use SAE sizes | When chasing threads on the car | $5-10 per tap |
| TS4000 propane torch | TS8000 with MAP-Pro gas | If propane can’t heat large cast parts | 10/cylinder |
| PB Blaster | Kroil | For the worst seized fasteners (exhaust, body mounts) | $15-20 |
None of these upgrades need to happen before practicing. The cheap tools teach you the techniques; the upgrades happen when you hit real limitations on real parts — exactly how the philosophy is designed to work.
Actions
Procurement (Stage 5)
- Source junk parts from pull-a-part yard or marketplace — stage:: 5
- Purchase helicoil insert kit (generic assorted, ~$20) — stage:: 5
- Purchase screw extractor set (Pittsburgh spiral, Harbor Freight, ~$10) — stage:: 5
- Purchase tap and die set (Pittsburgh 40-pc SAE+Metric, Harbor Freight, ~$35) — stage:: 5
- Purchase automatic center punch (Pittsburgh, Harbor Freight, ~$6) — stage:: 5
- Purchase drill bit set (Warrior 29-pc TiN, Harbor Freight, ~$15) — stage:: 5
- Purchase cobalt drill bit set (Milwaukee RED HELIX 23-pc 48-89-2338, Home Depot, ~$75) — stage:: 5
- Purchase thread pitch gauge (Pittsburgh SAE+Metric, Harbor Freight, ~$6) — stage:: 5
- Purchase penetrating oil (PB Blaster, any auto parts store, ~$8) — stage:: 5
- Purchase propane torch (Bernzomatic TS4000, Home Depot/Lowe’s, ~$30) — stage:: 5
Practice Exercises (Stage 6)
- Complete Level 1 exercises (torque fundamentals) — stage:: 6
- Complete Level 2 exercises (intentional destruction) — stage:: 6
- Complete Level 3 exercises (thread repair techniques) — stage:: 6
- Soak parts in salt water for seized bolt practice (start 1-2 weeks before Level 4) — stage:: 6
- Complete Level 4 exercises (realistic scenarios with penetrant and heat) — stage:: 6
Corvette Upgrade Purchases (As Needed)
- Purchase genuine Heli-Coil or Time-Sert kits in specific SAE sizes as restoration requires — stage:: 6
- Purchase individual cobalt bits above 3/8” if restoration requires (unlikely) — stage:: 6
- Purchase individual quality taps in high-use SAE sizes (5/16-18, 3/8-16, 3/8-24, 7/16-14) — stage:: 6
References
- Torque Wrench Selection — Torque wrench recommendations and calibration
- Water Bucket Calibration — DIY precision torque wrench verification
- Tool Purchasing Philosophy — “Buy Cheap, Upgrade When Proven” framework
- Air and Battery Tool Strategy — Hybrid pneumatic/battery tooling and compressor selection
Created: February 2026