Printed goniometric stage

This design is a printed out of plane rotational stage (i.e goniometric stage) capable of a positioning accuracy in the order of 10 micron. Besides 3D printed parts it uses 8 693ZZ and two MR95-zz ball bearings, one M5 and various M3 bolts with nuts and hot melt inserts. The complete fabrication process is described in an instructable: https://www.instructables.com/Build-a-3D-Printed-Goniometric-Stage-tilt-Correcti/

I have a quick demonstration video here: https://youtu.be/pMDN6k8GMak

I also designed various linear stages and a micromanipulator compatible with this model, all the files and building instructions are available here:

Linear stages:
https://www.instructables.com/Build-a-3D-Printed-Linear-Stage/
https://makerworld.com/en/models/485262
https://makerworld.com/en/models/485267
https://makerworld.com/en/models/485272

Rotational stages (in plane):
https://www.instructables.com/Build-a-3D-Printed-Rotational-Platform/
https://makerworld.com/en/models/496230

Mi