I build the most smoler case for the Full Body Tracking SlimeVR project: https://docs.slimevr.dev

The video : https://www.youtube.com/watch?v=3K52qEGQP64&t
The blog post guide : https://www.patreon.com/posts/86187423

I also upgraded the electronic conception, you will found new shematic on the pictures and the BOM here :

Wemos D1 Mini Type C : https://s.click.aliexpress.com/e/_DmIIdLP
Batterie LiPo 1800mah 804040 : https://s.click.aliexpress.com/e/_DFgoyGV
Li-Ion charger/ Boost MH-CD42 : https://s.click.aliexpress.com/e/_Deytxc1
Accelerometre BMI160 : https://s.click.aliexpress.com/e/_DDKcx1j
Wire AWG32 Black/Red : https://s.click.aliexpress.com/e/_Dl1Sweh
Straps (for 7 trackers)
2x 38x400
2x 38x300
5x 38x600 : https://s.click.aliexpress.com/e/_DkZA3Zb
Screw : https://s.click.aliexpress.com/e/_DkDtEgd

Bambu Lab X1 C

No

No

0.2

100

I linked the Fusion 360 project file, so you can remix the case as you wish ;)