🔍 What changed
Comparing the version from 12h ago by @tandy with the one from 10h ago.
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Work down in this order. Stop at the first thing you find, fix it, and re-test before moving on — problems here stack, and fixing two at once teaches you nothing.
## 1. Is the steering mechanically centred?
## 1. Is the steering mechanically centered?
**Set steering trim AND sub-trim to zero.** Now look at the front wheels.
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**Check:**
- Sight down the front from a metre away, then the rear. One wheel leaning differently from its opposite is the tell.
- Sight down the front from a meter away, then the rear. One wheel leaning differently from its opposite is the tell.
- Roll every turnbuckle on a flat surface — a bent one wobbles visibly.
- Compare left and right camber against something vertical.
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**Fix:** rebuild both, same oil, same technique, same session. Never rebuild one of a pair.
## 6. Tyres
## 6. Tires
- **Compare inserts** by squeezing each tyre. A collapsed insert on one side changes that corner's grip completely.
- **Check the glue line** all the way round each tyre.
- **Compare inserts** by squeezing each tire. A collapsed insert on one side changes that corner's grip completely.
- **Check the glue line** all the way round each tire.
- **Look at wear.** One side of the car wearing faster than the other is not a setting — it is one of the faults above.
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1. **Coast test** — under power only, or always?
2. **Trim and sub-trim to zero**, centre the steering mechanically
2. **Trim and sub-trim to zero**, center the steering mechanically
3. **Tweak test** on a genuinely flat surface
4. **Ride height and droop**, left vs right
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