I have been reading about all the problems associated with IRD cassettes in the various threads. I see by their web site, IRD now offers an extended range(11-34) cassette that is Campy compatible. We would like to mate this with Campy Chorus shifters(10sp). It would seem this would eliminate the need for a J-tec shiftmate/Shimano cassette combination. Does anyone have current info on matching these with either current XT or XTR RD's? The info I have read is from 2007 or earlier and talks about compatability issues with certain Shimano RD's.