Clip-on dual 50mm fan bracket for Printrbot

This is a bracket I derived from Cursedmagician's very cool clip-on fan bracket. I found that the semi-enclosed frame of the LC x-carriage blocked a lot of flow, so I added a second fan mount so the air would pass around the hot end better. It's a bit of overkill perhaps, but it seems to work for me.

A future version might have a downward angle to the fans so they are pointed more at the nozzle.