I’ve really had it

As noted on support, we will gladly send you a set of four replacement Delrin V wheels.

To repeat the balance of the message from there:

Did you make notes on where/how you set zero relative to your stock? We recommend folks use a log sheet for jobs such as:

If you could provide us with step-by-step notes on how you set zero relative to your stock we will do our best to investigate this from our end.