Printrbot Simple Metal Fan add-on.

***** 12/3/15 update *********

had to rework it some, got an all metal UBIS, and thought it was working fine, the fan was just slid down a touch, offset by my mount.. turns out that was causing me some jamming issues, So a redesign was in order. Its been operational on my machine for a couple days now and so far so great. If i find any problems Ill clean it up and get it posted. Smaller design this time, not as bulky.

I printed mine @ .05 layers 270 rotated on Y. 40% infill.