Update: wheel is built, though not fully as intended. I got all 111mm spokes from my LBS as one would typically assume that a symmetrical hub would need all the same length spokes. What I hadn't accounted for was using a 32 hole hub laced to a 16 hole rim means that the flange holes aren't spaced evenly side to side. Instead of the NDS hub flange having a hole in between each DS hub flange there are two holes in between each hole used on the DS and I had to pick one of them to use. This resulted in what ideally would have been one ~112mm spoke and one ~108mm spoke per pair of spokes.

As a result of that, the wheel got laced with 8 111mm spokes and 8 106mm spokes (from the original wheel) as I ran out of threads where the short spokes were required. Truing was easy thanks to a very rigid rim and I tensioned using a rough estimate of torque from a torque screw driver I had. The Park Tool TM-1 is too big to fit those tiny spokes and plucking (or squeezing two) such a short spoke doesn't tell one much.

Haven't used the bike yet but the difference in rear wheel friction is staggering. One quick turn of the pedals used to yield one extra revolution of the wheel at best. Now it spins and spins. The steel coaster hub was also a brick at 810 grams. New hub and freewheel weigh a combined 390. I still need to add the new caliper brake, brake lever, and cable housing but the weight should still come out slightly ahead. Not that it matters in the least but I didn't want to do all this work and add weight to the bike either.