Tevo Tarantula Z axis inverted leadscrew holder

These are supposed to hold the leadscrews for my z-axis in place. I have inverted the leadscrews, so the motors are at the bottom.
I used these motor mounts: https://www.thingiverse.com/thing:2516108 ,
but the included leadscrew holders have no bearing and i wanted to use ball bearings.

Spacing from the middle of the leadscrew to the 2020/2040 profile is 42mm.

The design fits 608 bearings.

To connect the leadscrew to the z-axis profile, I used these couplers: https://www.thingiverse