After much thinking, I have decided to go with this motor:

http://cgi.ebay.com/ws/eBayISAPI.dll...m=310054176832

It is 8.9 RPM, so it needs to be geared down only about 3:1.

I looked more closely at the steel that I have, and found a good about
of what looks like 12-14 gauge sheetmetal.

So I think that I just might have enough to make what I need. I will
not statr yet because I want to do one project at a time, and I am
busy with the mill. Maybe next spring.

i