I tried to mount some HS22's to my Zaskar last year. I was running modern rims and they wouldn't fit. Went through a lot of trouble trying to set them up properly. I think if I'd had retro rims at the time, I could have gotten them to work fine. Much of the pissing around was because they came with one blown piston.
I found some good resources on the Magura site and they have some good technical videos on youtube. Personally I don't think you get much more braking than v-brakes out of those suckers. I'm sticking cantis on the Zaskar because I'll always be able to fix those.