Fan duct for Sells Mendel

This is a mount and duct for a 40mm cooling fan that will fit the std Sells Mendel X carriage. I could only find one fan mount for this venerable machine and I wanted to duct air closer to the hot end than this would allow. The duct will mount 40mm fan and attaches to the carriage by replacing one of the belt clamps. I have sized the model for my Mendel on which I have replaced one of the belt clamps with a tensioning clamp. Which you can find here http://www.thingiverse.com/thing:16012. The mo