Geeetech Prusa I3 Pro C - X Axis belt tensioner and bearing upgrade

After a friend and myself found we were having to change the Geetech bearings way to often and having some sets fail after a few prints we thought it was time to fix the problem once an for all.

We had the issue for both X and Y axis.

Here is the Y axis fix http://www.thingiverse.com/thing:1687544.

The problem is the bearing sets Geeetech use are garbage and hard to source unless your happy to wait from china.
Plus the design has had little thought. The roller holder when you tighten