I did make some changes to the wheel design. I did keep the 1-inch flange bearing on the underside of the wheel head but decided to go with a 1-1/4-inch flange on the bottom.
The baseplate is 22 inches in diameter and I had the machine shop cut the 3/8-inch steel plate round just because I thought it would look better.
There is a 6-inch square steel plate welded to the base. A hole was drilled through both plates and the shaft was inserted and welded into that. The square plate was added just for strength. For my next wheel I am not going to weld the 6-inch plate to the base. I will have holes drilled and tapped to accept stove bolts to attatch the shaft to the base. If you decide to build one you'll see why.
Anyway, this wheel is pretty sweet. The last thing I have to do is re-drill the hole in the bottom of the wheel so that it will accept the 1-1/4 inch shaft. Originally it was built for a 1-inch shaft.
If you hadn't read all the previous posts about the building process of this wheel and are interested in building your own wheel, just search my archives on this blog.