It's a very nice design! I just saw it posted on cnczone.nl (dutch version) and i really like the way it works. Very simple.
I saw in your PDF files 0,01mm(?) acuracy, which is impressive!
But is it going to compete with ballscrews? even C5 and maybe C3? Or is this for speed and people who want it. I like it because it would eliminate the need to build any type of bearing houses.