Printrbot Plus V1 Z bar stabilizers

I printed a couple other sets of these, but none would fit the pattern of screw holes on my V1 Printrbot Plus. The screws are not placed symmetrically, the 12mm shaft is not set evenly between them. This set fit my PB+ exactly. The OpenSCAD file is included.

I've added a diagram of the dimensions used for laying out the Z-Axis holes. (Which doesn't seem to show up above, here's the link: http://thingiverse-production.s3.amazonaws.com/assets/4d/d8/20/b6/4e/pb%2B_V1_Z_Holes.jpg )

I used