This build is to show what's possible as well with openBuilds! I use a single ArduinoMega and 5 separate stepper drivers (A4988). The LEDs are all NeoPixels. Collision 'detection' is all done within the code, so the endstops are only sensors I use in this build. I'm a self-employed video-artist and this is my first installation which just needs power and it runs (where I'm quite proud of). Normally my interactive installations take a long setup time, so this installation is a relief :)