another customisable (not via customizer, though, ATM) bowden extruder for geared nema17 motor

The extruder can be customised for particular pulley and idler sizes, spring length, etc, but one would probably need to download source code — https://gitlab.com/parts/extrudery/tree/master — and render the customised parts. The provided sample customisations (corresponding to the uploaded STLs) are for my two extruders.

* E0

pulley diameter 12.65mm with the teeth 7.9mm from the bottom of the pulley

* E1

pulley diameter 11.5mm with teeth 7.5mm from the bottom of the pulley

bo