X Buckteeth Leader parametric

I've found that the x idler pulley tends to ride up against the top y carriage wood. This creates noise and other problems.

There are bearing and belt holders and all manner of x axis improvements but I've yet to see one to fix this. The idler rides up due to the belt being pulled up to mesh with the x carriage belt teeth.

My solution is to customise the teethes position to match the belts natural path.

This is based off of Joakim's x follower openSCAD file so it can match its customiza