Bambu Lab PTFE Guide

C&P from original: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). I made a few changes to this remix to address some issues I experienced.Wi