Sorry I was wrong. I used to have a Zee derailleur on my full sus, but now it's a SLX medium cage. I've been almost exclusively riding my hardtail the last six months, so I forgot that I switched to SLX on the full sus (I guess more than a year ago). As I recall, I did this because even with a longer B-screw, I wasn't able to get the Zee running perfectly. I'm no mechanic though, so someone with better skills might be able to.
I guess it's no longer of the same interrest (now it's SLX and not Zee), but I'll take some pictures for you Andrew, if you want me to.