Felix 3D Printer Filament Spool Holder and Guide

(Updated Feb. 10,'14) A thingy-in-progress! I was looking for a solution for spool placement on my DIY Felix 2.0 and realized I had enough hardware left over to make a simple post-mounted spool holder myself. It fits the standard 1kg filament spool with a 50mm diameter center hole and 75mm width just fine with slight side-to-side play to reduce friction. My first file had a flaw where the extruder would hit the holder when in the x-axis home position. This spool holder's new position has been te