Made a few changes to the original model you download around. The “tiktok” version had a lot of problem turning due to excessive flessibility and wear trough time fast.

The Rack now is twice the lenght and works like a charm, the support where the rack slide are also 2 instead of 1.
I found the original wheel to be unconfortable, so i designed some more like the f1 one wich is my favourite one, the bmw one is olso good but lacks a bit in beauty. the cup one is a bit flexible but only to worry when removing the supports from printing.

I may also say that you need to trim a paper clip to make the pin to connect the rack and the pivot.

And you need a 608 bearing that you can get from a common fidget spinner, in case the measurements are the following: Inner Bore = 8 mm; Outer Diameter = 22 mm; Width = 7 mm.

Well that's it. Just remember to plug in the bearing before the rack or you'll destroy the teeth of the rack hahaha