Delivered on Friday...
Spilled $40 on 7/8" and 1" 'Silver and Demming' drill bits and took most of Saturday drilling out the counterweights.
Geez that cast iron is hard! Almost killed my little hobby drill press in the process but we got 'er done.
I was suprised to find that the new coupling nut is not made of steel like the original but looks like cast aluminum alloy of some sort - certainly not billet but I did not look at it that close.
During assembly I found the threads on all parts to be smooth and tight - very nice! For cheap insurance I chose to use some blue locktight on the shaft to nut threads, as I do not foresee the need to take them apart anytime soon.
Overall very happy with the fit, function and asthetics!