Finally, I have a crankshaft! The 4th try is the charm, so I made two at the same time. I made two in case one of them got messed up. Well, they have both turned out (almost anyway, not quite done with the second but close).
I put the one finished shaft into the rest of the engine and it is a perfect fit. Spins smooth and free. I'm still working out a little binding on one of the connecting rods, and the valve gear seems to be a little bit off. Last steps will be to cut the valving and paint.