MendelMax 2.0 Upper Filament Guide

UPDATE October 28, 2013: I've uploaded an improved version (Upper Filament Guide 2) that makes the hole a little smaller, and moves it a little closer to the stepper motor. This results in much improved reliability.

I noticed recently that my MendelMax 2.0 was squeaking whenever the filament was being retracted or re-engaged during printing. When I looked closer, I noticed that the upper filament guide that came with my printer was flexing up and down at the same time. The delamination was ob