tank chassis + threads

This is a fully 3d printable tank chassis including the threads.
The middle part can be rotated by the dc motor inside the chassis.
I printed the threads using TPU filament, and PLA for the rest.

Additional part list:
https://www.aliexpress.com/item/32860179258.html?spm=a2g0s.9042311.0.0.524d4c4dDilE2T

https://www.aliexpress.com/item/32860531022.html?spm=a2g0s.9042311.0.0.524d4c4dDilE2T

https://www.aliexpress.com/item/33057929198.html?spm=a2g0s.9042311.0.0.524d4c4dDilE2T

https://www.aliexpress.com/item/32855540550.html?spm=a2g0o.detail.1000014.2.4b3b745cW8GvYw&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.133222.0&scm_id=1007.13338.133222.0&scm-url=1007.13338.133222.0&pvid=66f87311-cded-4e2b-83be-471f16064582

I used M3 bolts to mount the motors.
Also used 4 additional ball bearings and 2 additional bolts to mount the wheeles.