Bowden Tube Mount and Retainer Ring

This is a clamp and mount for PTFE Bowden tube to be used as a guide to the extruder. I'm using Ikea Lack tables as an enclosure, and have been using this https://www.thingiverse.com/thing:2228363 to guide the filament through the upper table. Problem is, the filament eventually wears a groove in the bottom of the guide if you do not have a straight down shot to your extruder. This would cause the filament to drag and jerk and make a horrible noise. Using this clamp and retainer ring, you can us