spindle length depends on the profile of the crank arms you intend to use. for the RF turbine LPs, it's range is 107/110/113m depending on the f.mech clamp size, in this case being in the middle at 31.8mm (28.6/31.8/34.9mm), i used 110mm RF ti BB.
final build… XTR m950 levers and v-brakes, and stem/bar swap with slightly shorter stem with tad more rise and slightly wider bar, both remaining Ibis.