I'll always have a warm spot in my heart for Huntsville. The home of the Saturn V rocket.
Oh, well......enough of that.
A hub adapter, I would think, needs to be built to some fairly close tolerances and it'd need to be strong. Not that I'm trying to discourage you. I can admire a person willing to tackle a difficult task. But you might have to go slow and careful.
Maybe you ought to use the rag joint to get around and then build your own hub adapter on a spare wheel. Then you could take your time about it.