v0.3 (PCB + Mechanics)
- New controller design: Arduino-compatible shield, chainable for up to 12 modules controlled from a single Arduino Uno
- Eliminated 5mm rod/axle for spool; uses M4 bolts instead, for easier parts sourcing
- This is the design seen in https://www.youtube.com/watch?v=04el3LYiOaI (the center module; the outer modules are v0.2 modules) and https://imgur.com/a/0VAMZ