Prusa i3 Adjustable Y-belt Tensioner & Holder

2 version, one design for i3 with LM8UU bushing holder and the other for without bushing holder, lower profile version. Design for T2.5 belt.
Update .15/06/14
I've added holes to the top for zip ties, Thanks to RegionX. for the idea.

Update: 20/11/14
The [GT2 version](http://www.thingiverse.com/thing:548458) is now as remixed.