I recently built the Ninja CNC kit from CNCSNAP.com. They recommend you use a fan to cool the board but they don't include a fan or an enclosure. So it bought a "thunderblade" 80mm blue led fan from radio shack and designed this enclosure for the board. I didn't feel like designing fastener attachments for the top-base connections so I just heat welded them together. Feel free to modify the design to use a different fan if you like. Check out my other Upgrades for this kit. http://www.thingiverse.com/thing:16749Get an 80mm fan. Print the parts. attach it to you CNC machines board and wire the fan to the + and - fan terminals on the board.