Geoff's Y-Axis Idler Pulley & Gear for Solidoodle2 - all 3D printed

This is my (hopefully improved) Y-Axis Idler Pulley & Gear for Solidoodle2. It's all 3D printed, the only extra parts are the 2 ball bearings and a piece of 2.5mm carbon fiber (or steel) to strengthen the (fully printed) toothed belt pulley.

It's the absolute minimum size needed to do the job properly, and my Print Head carriage doesn't crash into the Y-idler bearing assembly anymore, plus it's really quiet and should never wear out.

Also, the inside is curved, so the toothed belt just s