LM8UU bearing clamp in Heeks

Now superceded by http://www.thingiverse.com/thing:30365
Yet another Y-axis bushing clamp for an LM8UU bearing - this time in HeeksCAD.
I designed this as I am working on a y-axis carriage for my Mendel Prusa and all the clamps I have seen are in SCAD format which cannot be read by HeeksCAD.
I probably will never actually print this as it is more of use to anyone designing an X-axis or y-axis carriage.
There are two source versions here - "Y_bushing_clamp2" is a complete fused object for pri