Ah yeah, I meant 4th. I actually did see it in the documentation and black sprayed all the optic disks. Maybe the spray was not enough, I’ll try the black nail polish too, thanks a lot!
For now to avoid homing I made an arm rest for the robot, uploaded it to thingiverse: https://www.thingiverse.com/thing:5401543
It acts as a manual way to home it when it’s powered off, also keeps things safe and makes it easy to change the tool. Btw in the photo on thingiverse you’ll notice a revopoint 3d scanner attached as a tool. I wrote a sequence that scans someone with multiple passes when they sit in front of the robot, then turn it into an stl file. This robot is super fun. 😀