New version added 2 inches to recover the full workrange of the printrbot. Also added the sloppy SW file.
Modeled a quick and dirty part to hold my spindle in place. This was for my Printrbot Plus V2 with 12mm diameter rods.
Modeled in solidworks..
I used tape to hold the horizontal bar in place. Although, there are better ways... Just slides onto your Z-bars. I'd recommend printing with support.