Bear extruder body with separate sensor insert

This is a sliced up version of the Bear Extruder body that separates the part surrounding the filament sensor into a separate piece. This allows the extruder body to be printed in any color, and print only the part around the filament sensor itself in black.

I printed them as two separate pieces in two different colors, but they could also be used to print a single two color piece with an MMU.

When I printed them separately I did not scale the insert at all, so it was a tight fit into the extruder body, requiring a bit of help with a rubber mallet to get it into position. It's wider at one end than the other, so it needs to be inserted from the side with the extruder motor cutout.

If you are printing your filament sensor cover in a color other than black, you will probably want to color the underside with a black sharpie.