Hi folks,
recently I came across the ORBION - The OpenSource 3D Space Mouse:
https://github.com/FaqT0tum/Orbion_3D_Space_Mouse
I instantly wanted to build one and ordered the components for it (luckily there is a good “BOM” list with AliExpress links to all parts). Yesterday the new version 2.5 was released and now I need to re-order some switches and bearings to not miss out the upgrade 
Has anyone of you built an ORBION? Or a different DIY space mouse model? Here are some alternative models I found:
https://github.com/mattogodoy/mighty-mouse
https://www.youtube.com/watch?v=68EapQbDBOc
https://www.instructables.com/Space-Mouse-With-Arduino-Micro-Fully-Printable/
Last but not least the luxury Ahmsville Dial V2 „Series“ (there are different variants), which looks really amazing, but challenging to build:
https://www.hackster.io/ahmsville/ahmsville-dial-v2-a38b17