Transmutation Circle (Extruder Rotation Indicator)

I've loved all the different designs for extruder indicators, but I felt a little fullmetal twist was lacking. Here are three different variants of the transmutation circle, for whatever level of backfill you prefer. Ive uploaded them as .3mf files, as I find they work best, but due to Thingiverse rules, I am required to upload at least one .stl file, which is why the "ignore" file is there. The 5 cm circle is the classic indicator size, but I found the 7.5 cm size allows better detail when using a 0.4 mm nozzle. If you want to use a different color backfill, a simple filament color change at either 0.6 mm or 0.8 mm layer height is all you need to do. The magnet circles are for 6x3 mm magnets, and they should fit perfectly into the Prusa extruder motor indentation. Have fun!