Re:
Thanks Jimo and MR OX, I'm looking forward to seeing how light it comes out. Wheels and tyres should save a big chunk, I'm waiting for the nipples to arrive then I'll get them built.
Next up were the mechs and cassette. XTR is pretty light already, but I wanted a short cage mech so I took the paint off an old Shimano 600 gave it a polish and added some blue bits.
27g saved.
For the front I used an Exage ES, polished with blue bolts, swapping from bottom pull to top pull gets rid of the roller and another 11g.
For the cassette, went from 12-32 m900 to 11-28 m737 with a later XTR alloy lock ring saving 77g.