MMU2s IR Sensor Holder tower (strengthened)

thingiverse

I kept experiencing filament runouts during non-MMU2 prints until I realized the stock IR filament sensor tower meant for MMU2s had cracked on the thin side. This side was only one perimeter thick, all the way to the edge, and split easily when the rest of the print was solid. I chose to reinforce just the back edge to prevent it from tearing out if/when the sensor is pulled, possibly during servicing, but that's speculative. It surprised me they thought one perimeter would be sufficient for something that needs to be extremely robust.