Got requested to dig up some pics of this one, one of the first or maybe the first sub30lbs/13,5kg dh bikes.
Lots of things going on with modded derailleur, shifter, chain guide and XTR cranks made to fit.
I'd say my methods has been slightly refined over the years (this was 2010), but I'd still say that sometime you just gotta drill shit. But I would've used a nicer screw now. If I remember right I ran it 7-speed using a DA cassette. It did hold up though and I actually still got that derailleur laying around somewhere!