The anchor points must be fixed, minor movements in of the anchor
bolt make a large difference, Some people have used 3d Printed stiffeners, others wooden blocks to prevent bolt from bending under pressure.
Anchor belt ends must also rotate easily
You will need to adjust the Z values to match the now level belts. The software compensates for the anchor points to be at the same height as the base and defaults to compensating for this with variable heights for each belt with the Z values (mine are level). Be sure you have put the arms on in the correct order if you decide to not raise the belt height or adjust the Z values to reflect what you have.
Reducing the force required to retract does minimise the fighting of the belts. This may require ensuring belts can rotate freely, but we try everything else first (Don’t want to pull arms apart).