As mentioned, this site is more general than some other 7 sites. WCM has a site for
S2K owners that is almost all technical help.... the California Caterham site has a lot of help, both technical and actual people (in So. Cal anyway). I wouldn't doubt that Birkin & Westfield also have places to help owners of those brands.
At first I was surprised there wasn't a technical section that was broken down by brand of cars but soon figured out that most cars aren't that different and there was other places for particulars.
I think this site is best for the social networking of all 7 owners... blats, events, trackdays, and some technical stuff when requested.