I might have a solution to the above conundrum. The original wheel spoke nipples have been soaking in penetrant for a month. All but 4 are now loose. One of the stuck ones has the nipple head and the end of the spoke ground off. Two other spokes are sticking pretty good beyond the nipple head. This is because spoke tension eventually pulls the nipple head washers into the wood and then more tightening is required, eventually you run out of threads. So, I’m thinking of using the original wood rim, nipples and hub. Replace it with spokes that are a little shorter. Since it’s inches I don’t know if I can find a set that is no more than 1mm shorter. Since I won’t use this wheel much I’ll use the cyclocross tubular on this rim. The rim and hub are so dirty that it will have to come apart for cleaning anyway. It’s got a slight wobble that probably can be made better with shorter spokes. Once it’s apart I can try and see if it’s dry rotted. It’s got to have some decay just because of age. I have respoked and used wood rims that are 100+ years old and they are fine, except for the badly fitting modern tires. This way I’ll have a safer ride with the armless coaster brake hub and still have the original wheel to keep with the bike.