Prusa i3 X Carriage Spacer (30mm spacing)

I designed this spacer so that my j-head hotend cooling fan wouldn't bump into the x carriage. Now I can rotate the fan mount to the sides 90 degrees to make room for a front mounted print fan.

The extruder I'm using this for is: http://www.thingiverse.com/thing:65939

The spacer is 10mm thick to give plenty of clearance for the fan mount.
The holes are 30mm apart and are M3 sized to fit the x carriage.