X carriage mounted extruder filament guide

This assembly bolts up to the stock extruder mounting holes on the Reach 3D printer. The holes in the Mounting Bracket are sized to be tapped. There are 3 M3 holes for mounting to the printer and 1 M4 hole for assembling the unit. The fasteners required are 3 M3 x 8mm to mount the unit and 1 M4 x 20mm to hold the assembly together. A 20mm OD x 8mm ID bearing gets pressed into the middle of the guide wheel. Slide the bearing cap onto the M4 screw, then slide the guide wheel onto the bearing cap.