This is the cooling fan holder for a Rigidbot 3d printer with dual extruders.This is the cooling fan holder I designed for my Rigidbot (big) Kickstarter kit printer with 2 extruders. This is my first 3d printer and my first attempt at designing a 3d printable model. I used 123D Design to create the fan holder and printed it using Cura. The settings used were 205 degrees (PLA), heated bed at 70 degrees, 100mm print speed, 2mm layer, Platform touching only line style supports. It was very easy to clean the supports and it works great so far.