Orion Fan Upgrade for Replicator 2X

My right extruder fan started acting like a jet engine-- spinning up slow and making a whole lot of noise. I decided to upgrade to a set of ball bearing fans.

I also like Wingcommander's retaining pin, but they weren't quite the right size for this setup, so I shortened the length of the pin and rounded the cap a little. These pins hold the fan guard in place at the top of the fan where normally the holes are left empty.

Orion brand fans have a good reputation on the [Makerbot Operators