v0.4 (Mechanics - gearless)
- Eliminates all gears - the spool is now directly driven by the motor for less mechanical complexity
- Adds an optional connector piece for loosely attaching adjacent modules to each other, and a 4mm hole on the top and bottom to allow modules to be attached to an external structure if desired
- This is the design seen in https://www.youtube.com/watch?v=vq4o_88kN8g (all 4 modules)