Been googling a bit, really got this thing in my head now.
Found another nice design:
http://www.steinmeyer.com/english/te...s/drs_funk.htm (see the first image). No need for threading tools to make it.
http://www.about-ars.com/IHD/ARS_PS_RV1.htm and
http://www.about-ars.com/IHD/ARS_PS_RVR1.htm describes the differences between satellite and recirculating rollers.
I know that SKF was mentioned earlier, but their PDF is very descriptive:
http://skf.manager.nu/publication_fi...7551246328.pdf (7,84 MB)
There's also a picture on the first side where the gear ring has the teeth outwards, would be easier to make at home. The recirculating version seems to be pretty straight forward, later on I'll try to make on of those or the "german design" I mentioned...
--S