Mega Zero filament runout and tangle sensor

SummaryNOTE: This is for the AMZ version 1, the new Mega Zero v2 seems to need the mounting point resized a bit before this will fit. The FreeCAD project is included if someone else would care to remix things to fit that version, or I may try to come back and update this later myself if I have the opportunity.After seeing variations of the filament guide, I decided to make my first "from scratch" freecad project. This filament sensor for the Anycubic Mega Zero re-uses the "go big" filament guide wheels from https://www.thingiverse.com/thing:4683505 that I had already printed. I also copied some of the dimensions for the screw less mounting bracket slot from that same project to ensure a similar perfect fit of my design.The sensors are inspired by the idea behind https://www.thingiverse.com/thing:3319350 and the wiring and configuration should be similar.Switches should be wired in series, in their normally open positions, so that they are "closed" when the filam