CobbleBot Horizontal X Axis Mod V3

This is version 3 of my CobbleBot X Axis mod. Don't bother looking for verison 2, I did not post it. This has completely removed the issue of X backlash for me and I can now properly print with my printer.

This mod basically attaches a drive shaft to the X stepper motor that then drives two belt pulleys. One at the top of the X plane and one at the bottom. This keeps each end of the Y axis moving as one. The stepper is mounted outside the frame of the gantry and the drive shaft runs just underneath the gantry. The coupler for the drive shaft is inside the stepper mount. There is a slot in the stepper mount for turning the set screws on the coupler.

In addition to the printed parts you are going to need four 625 radial bearings, two idler pulleys, a 5mm drive shaft, two 5mm pulleys, and a 5mm to 5mm coupler. Here are the ones I used:

Bearing - http://openbuildspartstore.com/ball-bearing-625-2rs-5x16x5/
Idler - http://openbuildspartstore.com/smooth-idler-pulley-wheel-kit/
Pull