Threadless Ball Screw, 10mm travel pr. rev

You can se some pictures, read a little and se videos of this design implemented on a CNC router here: http://nengineering.dk/cnc-machinery/cnc2014.html

I made a derivative of the very nice threadless ballscrew concept from Mark Sollack. When printing the original I found that the bearings was not perfectly aligned with the smooth rod, resulting in wear on the rod.
Also I wanted a travel of 10mm pr. rev, because it's easier for me to deal with. The angle of the bearings are therefore 21.7