"shreddr" an A Arm swap like you did with the 1200S would be awesome if there was such a beast for the 1100. Fabricating the 10mm mod on the 1100S A Arm isn't too bad using 'Scotts' instructions as a guide. I can see how you could get yourself in trouble if you didn't have the right tools and experience in doing this mod. I found it easy enough to ensure accurate offset if you use the bearing centres at the other end of the A Arm as the Datum. If I had to do another one I would fabricate an accurate Jig which would save all the measuring and marking out.
Its great to see active mods happening on all the BM's. I thought my GS was modified heaps but you guys make it look stock!
JeffGill is coming with us on a 2500k ride in a couple of weekends so that should give his A Arm a good test...
Stephen.