MPCNC rigidity upgrade? Or downgrade?

[DJPicasso (DJ)]

and also here

Solving Z axis lifting problems, stepper losses

I had a couple of problems working with hard aluminium (AW-7075) using my PRIMO. During miling the spindle/z-axis lifted in steps of ca. 1/10mm and depending of the deepth sometimes up to 0, with normal miling but also trochoidal. So I have modified a couple of things at my PRIMO. Additional stabilizer / clamping block for thread rod nut [primoadj030] First I realized a new stabilizer or call it clamping block for the thread rod. Mine is a T8x8 2mm, so standard! This clamping block will be…