Corner & cross weights

1. Find three blocks the same height as the scale platform. Anything rigid and flat works: offcuts, hard foam, a stack of coasters. Measure them against the platform rather than guessing.
2. Set the car up as it runs: battery in, body on if you run one, wheels and tires fitted, shocks at their normal ride height. Weight moves when any of that changes.
3. Put the car on a flat, level bench with the scale under one wheel and a block under each of the other three. Check that the chassis sits level, not nose down or tipped toward the scale.
4. Let it settle, then read the value. Roll the car back and forth an inch first so the suspension is not bound up.
5. Move the scale to the next wheel and put a block where it was. Repeat until you have all four.
6. Add the four readings. If the total is more than about 1% off what the whole car weighs on the scale in one go, a block is the wrong height or the bench is not level.

Tare the scale with nothing on it before each corner. Numbers that drift between readings usually mean the scale is on carpet or a flexing surface.