Bambu Lab PTFE Guide

Update 03.01.2022: version v3 is available. The bend radius has been changed to roughly 40mm to address the binding issue, which could create problems when loading stiff/rough filaments.Update 29.12.2022: added new version PTFE_Guide_v2.3mf. The overall height has been shortened again, to prevent the top of the guide from scraping the front of the housing, when unloading filament (see last two pictures). For this remix, I made a few changes to address some issues I experienced.Widened the outer