Hi Andy, the front sprocket and crank is the standard one that comes with the single speed swift, theres a 16 tooth sprocket at the back on the automatix,
Spacing wise there's a 5mm washer then the slotted *washer either side of hub.
The chain tugs are standard bmx tugs nothing special.
The bracket that's holding the coaster brake arm is a bit of an old bike light bracket I had laying around it seems to do the job fine.*
The bars are pro-lite feather bars that iv cut down about an inch of either side,
When I cut down the riser I cut it as low as possible while leaving enough space for the quick release to still work and get the stem on,
I'll take some more photos of the rear dropouts and spacing and add them to here: http://swiftbike.zapd.net/
Like I said the hardest bit was setting up the SRAM automatix to shift at the right speed as its made for bigger wheels. I do have some photos of the hub when I dismantled it just so I new how to put it back together again if any ones interested?*