Current Projects chat and miscellany

With the proviso that I wouldn't, as I'm not in the market for a weight weenie fixed bike, but M5 and Extralite have disc fronts in the 100g area, M5 in 32h only but with conventional spokes, Extralite in a choice of drillings but with the hassle of straight pull spokes.
http://www.m5-ligfietsen.com/uploads/Itemizer/popups/1710.1.jpg
http://www.extralite.com/imagesbike/UF%20SPD.jpg
I haven't looked at either in detail to see how tough the hack would be to convert them to 120mm bolt on fitment. Either way, you're looking at close to £200 for a hub and probably another £100 to get the custom axle + fittings made

I was wondering about this, and it got me wondering about other hubs. Mainly the Tune Singlespeeder D.

Is it possible to space a MTB hub down? - I'm thinking of 5mm not 15mm btw.