Thanks, velotimbe! BF is such a resource... Don't you happen to know what sort of "flange" dimensions it has with regards to spoke length? It'll obviously need pretty long spokes, and that seems like the biggest problem right now. Plus I'm a weight weenie and this thing is pretty heavy... but I still don't know quite how heavy.

I don't want to do a conversion to 10 mm at all. The plan is to find a 9*1 axle that's long enough for my 130 dropouts, put on 30mm worth of spacers and bolt it on. I'm pretty light (124) and ride with good technique so I don't smash into things. Even spaced out, a 9mm axle should be fine. No quick release though, of course. (The 9 axle is even helpful, cuz my frame has semi-vertical dropouts so it gives me a bit more leeway for chain tensioning. Yeah, this is a hack build of sorts, but who cares. It rides perfect.)

Surreal: of course, you can do this with any Shimano disc front hub easily. (Shimano is preferable because it seems to be the only available affordable disc hub that has a standard threaded axle that you can get in the desired length) I just like the look of this flangeless thing, and I can maybe get one cheap. Ironically, mine is going to be about the only rear wheel that doesn't benefit from the design... I can pop the cog off any time with an allen wrench if I need to change a spoke anyway.

I didn't come here to debate the practicality of a build like this. I'm super confident that it is bompproof to the point of being indestructible, unless I f**k up the axle swap or the cog drilling. I came here for flangeless hub testimonials.

Again, much as it would flatter me, this is not my revolutionary idea. It has worked for a couple of people already. Dennis-Bean Larson at fixedgfeargallery.com is one. Boone even make super-sexy high dollar Titanium cogs specifically for bolting onto ISO disc hubs. If you start out with a SS disc hub, you get a flipflop with a coaster/fixed option.