Solidoodle Extended Filament Guide - Remixed

This is a remix of Lawsy's Filament Guide http://www.thingiverse.com/thing:85707.

I used the ideas there and redid it in Fusion 360. The connections to the Z table rods are not as tight, and it's held in place by magnets rather than clipping in.

I also rounded the front edges slightly and made the rear hole 6mm. This allows me to use silicone to glue a length of PTFE tubing in place. It helps protect the filament more, and it extends far enough to the back that the filament spool no longe