Must be the M900. I will see if I can find the details for you in a folder but can't prommise. With a bit of luck the PDF will be on the net tomorrow evening but I will keep you all updated about that.
I think the problem with the frontmech is it is not able to shift to all the gears? If so, the Campy had the twist shifters like the later Sram ones. The twisters can be possitioned at any place on the frontrings. The XTR setup also has more "clics" than the normal ones, so again a better possition over the rings.
I will see what I can do for you Deelam.