Simple 688 bearing guide for Z-axis leadscrew on Anet A8. It's mission impossible to make original Anet flexible motor coupler to rotate perfectly in center. This guide force flexible coupler to stop wobbling and makes leadscrew more stable.
Please don't print any upper leadscrew supports. Leadcrew on Anet A8 SHOULD be free on top, because if the leadscrew is fixed in two points, any unevenness results in wobble on X axis. If you leave leadscrew free on top, no force is pushing to X axis even if leadscrew is bended.
DrzakLoziskaZsDorazem.stl is variant with Z endstop mount.
V1 stl files bearing hole diameter 16.3mm
V2 stl files are with sligtly smaller and conus hole for bearing from 15.93 to 16.3 mm