Excellent! I've just multirelease-ified my XT shifters, well ryan in the workshop did anyway. Turns out shimano have done what I've heard of several electronics companies doing. Use the same hardware/manufacturing for the top and not so top of the range models then disabled the really fun stuff on the cheaper models to justify prices. Bit of bodgery and your XT shifters behave just like XTRs.
Time for mtb top trumps does M952 beat M770? Do I replace the older XTR shifter on my heckler with this bodged XT or just put it on my hardtail? Oh the pressure.