Ten years of shotgunning boards and I once replaced three in a row on the same fridge before I finally tested the thermistor. The customer got a free board buffet that week. That Tulsa guy saved you a lot of callbacks.

Man, which company? Mine still makes me call.

The offset thing is about the part of the vid that shows the movement, not the whole rig. Cable drive systems use one, and if a trainer won't let you see those numbers or change them, it's because the numbers are doing the work instead of the lifter. That's why the rule holds up.