I was trying to measure directly current to force - it wouldn’t be an automated solution, more an aim to show if it’s true or not to then work out what next.
Also @bar - one thing I found interesting back when I was playing with calibration algorithms - delete either all the outside rows or all the outside columns and re-run calibration on a set of data and compare - it seemed like it tended to give different results, which I think implied to me that differing belt stretch due to angles might be a thing, but obviously without any proof.