Extruder Rotation Indicator - Made In Detroit

This is an Extruder Indicator I made for my Prusa MK3. I used the ColorPrint feature to make different parts appear black, red, and white, depending on elevation of layers from the bed. Being from Southeast Michigan, the Made In Detroit theme seemed like a good fit for my printer. After printing, super-glue an 8 mm Diameter magnet to the center of the back, and then you can stick it right on the exposed end of the extruder gear to indicate when and how fast the filament is extruding. (And mo