I have a pair of M900 wheels going spare ( built last year onto 717 black rims ). Fancy making me an offer ( my usual 2 week money back NO-QUIBBLE guarantee applies ).
Also have a top pull M900 31.8 with shims for 28.6 if you're interested.
Have just won some M950 XTR cranks, am getting some M950 XTR hubs on Mavic rims later, looks like and M950 build then! Will complement my M900 Clockwork well!