I assembled the fork and wheel for the nose gear. The parts went together easily.
I had to clean up the threads on the top of the gear leg, I was not able to get an AN4 bolt to thread in smoothly, and didn’t want to chew out the threads on the screw. I used a 1/4-28 tap, after which the screw threaded nicely.
EDIT 7/29: A got a tip from Rodney (see comments below) that I didn’t route the valve stem correctly. He has a post on his blog that shows the right way. I’ll correct my nose wheel when I return from vacation!