Have you tried fitting that headset yet? Does it all look good. I appreciate it when you do my homework for me. Still need to find a headset for the "C" build.
Yes, the standard BMX headset with the 32.7mm cup outside diameter is what you want.
... what did you decide was the best spindle length for your TA's on the "C" build. I got a TA BB/spindle set up when I got my cranks, but have a hunch the spindle is too short.
On the "C" I put on a Shimano 68x115 with the TruVativ American-to-Euro Conversion kit plus a 1mm shim on the right side, but I'm nervous it puts the crank arms too close to the chainstays, so I'm going to try a 118 on this build.
Also remember, I'm running single chainring -- you're going to run a triple -- right?
I am starting to slowly find a few parts for the "C". I will get motivated and post a build thread here on RB.
I see you put up some info on your builds tonight! Can't wait to see them start going together!