Filament Runout Sensor for MM3 / UltiMachine RAMBo or Mini RAMBo

A filament runout sensor for any printer running a RAMBo / Mini RAMBo board, or if you have one of their endstops laying around. This part is designed to work on an MTW MendelMax 3, but I have included the .STEP and Fusion 360 files for anyone who needs to make modifications. This works for 1.75mm filament, but the actual endstop may need some adjusting to work right. Please note that there is only one direction the endstop switch can be mounted inside the piece, as the channel is slanted to kee