ordered and received my fixed sprocket for the disc mount from velosolo. i went for the 15 tooth version which requires "special bolts" to clear the chain. they are just countersunk bolts so there is very little contact on the sprocket but it seems sound enough.
good news is that somehow the chainline seems bang on for both sprockets, even after changing bottom bracket and cranks. happy? oh yes.
i can report that you cant ride fixed with a slack chain.
the cranks have gone back to the khs so i have slammed on some lx cranks and a 42 tooth ring for now as that is the only combination i can get to work without bits hitting the frame or having to use a 32 tooth ring. i planned th up the rear sprocket to 18 tooth to help but i can only find 3 16's. grr.
it has made my commute in the snow hard work.
as for the brakes, i'm starting to really like them and i think they are staying put.
swapped the seatpost for a nice canadian offering. hopefully bars and stem will go the same way. also replaced my good flite with this one as the people in the shop next door keep moving my bike and propping it up against the wall by the saddle