The part I designed is quiet simple but just works perfectly !
It uses a ball bearing that takes place at the top of the Z screw and prevents it from any movements along the XY plane thus completely removing Z wobbling.

It's available for download if you also want to greatly improve your prints quality.

Weedo Tina2 Anti Z Wobbling, Feb 2022

Weedo Tina2 Anti Z Wobbling, Feb 2022