External Spool Holder and Guide

2024-01-18: Increased the tolerances on the holes for the bearings by 0.2mm. Use a rubber mallet to fit all pieces together.2024-01-13: By request on the BL Discord, I have added a low-height filament guide that pulls from the bottom instead the top. This external spool holder puts your external spool directly to the left of your printer. I didn't like having it behind the printer, making it hard to access, and I don't like having things on top of my printer because of the vibrations. The included print profile has multiple plates with different options.Plate 1: 80mmRollers and pins.These rollers will hold any spool up to 68mm wide.For BambuLab spools, which are 66mm wide.Uses standard 608 skateboard bearings.Base boot plate.Universal closed left side wall.Plate 2: 100mmRollers and pins.These rollers will hold any spool up to 88mm wide.Base boot plate.Universal closed left side wall.Plate 3: 80mm GuidesFilament guide.Push in a BambuLab PTFE Tube coupler from the back, black sid