I know its an old post, but Im sure someone will come across this again.
I found this interesting article;
2000-11-01 RON BOWER SOLOY ALLSTAR
Interesting, but I also saw that Alexair is selling their, so who knows. I like the idea that there is a lot of people out that knows how to work on the 250 series, especially c20. And the c30 isnt that far off..