Dealing with broken teeth on the extruder reduction gears, just ordered 10 replacements and the just released redesigned k1c max upgrade extruder (all 2 weeks shipping) with the sprung tension adjustment that presumably allows the fat spot at the end of the filament to pass, rather than jam/break the gear on unload.
Any thought of changing the k800 gcode (filament change) to first do a quick filament purge then unload to get rid of the blob? Doing that manually as suggested by a user on reddit seems to make life a lot easier on the delicate K1 plastic reduction gears.