Low Profile Extruder Visualizer

A low profile (6.55mm depth) remix of GerryPB's excellent Extruder Visualizer.

Place 4 6x1mm magnets on top of the fixing screws of the extruder step motor (optional, easier position adjustment). Glue 4-6x1mm magnets to the bottom of the Back model.

For the Frontgear, there are 2 options:

1. 1x6mm, glue a 1x6mm in the end of the shaft and place a 8x3mm magnet on the axis of the extruder motor;
2. 6x6mm, insert a 6x6 magnet (or 6-1x6mm) in the end of the shaft (just push it in place or glue it).

I had some issues with option 2. It would jam quite often. Option 1 works well but requires an additional 8x3 magnet. 

Hope this helps.