Not really, I think the hub would be too hard to tap by hand. I was just kinda assuming the splines in the 7/16 studs would be big enough (and MAYBE the same) to substitute a 1/2 stud with the same spline size.
Well you know what happens when you assume. I guess if it was that easy, it would have been done, many times, and there'd probably be a sticky. lol.