Modification to allow for 3mm sized filamentSame instructions as the original, bearing block file in original design's thingiverse page.Derivative adjusts hole from 2mm (1.75 filament) to 4mm (3mm filament). Depth of bearing resting hole increased to accomidate design differences. Bottom support material adjusted for wider hole.This is yet to be printed, adjusting in advance for planned X-Axis upgrades.