Simple and discreet extruder indicator. Similar to A1 printer.
 

How to:
- Remove the transparent cover
- Press the indicator onto the extruder shaft (do not force it) to a depth of 3 mm
- Replace the cover

Attention: High temperature resistant filaments such as ASA or ABS must be used.

Since the cover is a little smoky, you need to use a very light color like white for the small circle.