About this 3D model

Here are some of my Printrbot Simple mods that I think are essential upgrades! The filament guide is a derivative of thing:128240 by johnbiehler. I added a feature on top to attach a 1/4" PTFE tube (from Lowe's) to guide the filament in better from the spool on the side (thing:118559). The fan mount is my own design for a 40 mm fan. I got my fan from Radioshack. The Z coupling is also my design. The feet are thing:129448 which I attached some rubber feet to the bottom of to prevent slipping.