Actually I read somewhere that there have been several incidents of secondry failure on both RW's own and privately owned machines, all of which were factory standard (35mm shaft and chain drive). It's not just an issue with aftermarket modified machines using stuff from Pro-Drive.
Tango Victor - don't get me wrong. I'm not slating the Rotorway across the board. As previously stated I think it's a great looking machine and once the issue is resolved, I would give serious thought to buying one.
Here's a couple of links to interesting RW sites with more info for anyone who's interested.
http://www.rotorwayfun.com/
http://www.rotorwayownersgroup.com/ (need to register for this one)