The adapter we used was the MRP ISCG 03 adapter:
As with my install, the adapter takes up 2.5mm of BB width, so had to remove 2.5mm of material from the BB shell on the drive side. Nomads come with 73mm BB shell width, so we brought it down to 70.5mm, so that with the MRP adapter, the total width is 73mm:
Once you cut the BB shell down, and put on the MRP adapter, you can see that the back side of the adapter wants to hit the rear bearing boss in the frame when trying to rotate the adapter clockwise (looking at it straight on from the drive side):
This is important because when in overdrive mode, the hammerschmidt wants to rotate the ISCG adapter clockwise, and now that the BB shell has been faced down, the adapter won't rotate due to the bearing boss being in the way. The only issue was trying to figure out if the adapter was clocked correctly.
We installed the hammer's alignment guide and it appeared to be slighly off. It's hard to see where the tape measure is supposed to intersection the arrow on the alignment gauge, so I drew a red arrow on where the tape measure should have overlapped:
If we decided to use it as is, I think it would work. In fact I think it would put the shifter housing cable in a better spot (closer to the frame, and less likely to get bashed by rocks). The second issue with the incorrect clocking is that the upper chain guide might not be able to rotate enough forward to prevent chain interference during full suspension compression.
Because he was so intent on having the alignment spot on per Truvativ's spec, we clocked the ISCG adapter where to Truvativ's alignment specs and scribed a cut line on the MRP adapter:
Then modified the adapter a little:
After the mod, the ISCG adapter aligned up perfectly with the alignment gauge and there was a nice flat interface between the modified area and the frame:
Finished install pics:
Neither of us was sure if there was enough material there on the ISCG adapter to create a proper interference to prevent rotation. But a few parking lot sprints in overdrive mode proved to hold up ok, so we headed out to the trails for a test. So far on one ride, it's holding up great and he LOVES the instant shift!
Moral of the story?.....
I think the un-modified MRP adapter would work even without the little cut we made on the back side if you use the 22T chainring with the 24T upper guide and just clock the upper guide as far forward as you can. This means that anyone who has access to a BB shell facer to cut down 2.5mm off the drive side of their BB shell (or get a shop to do it for them), could basically just buy the MRP adapter and run the hammerschmidt.
But then again, he's only got one trail ride on it - and this setup I believe needs a more testing on it. I'm gonna forward this link to him, so he can update his impressions on the setup himself.