Stan: My father and I bought one with both the vertical and horizontal spindle options back in the 70s. It is in storage now until I can get it set up again. First comment is that the speed of the spindle is too fast and we put a planetary speed reducer on it to slow the spindle speed down, what use it did get was primarily in the vertical spindle mode. It may be that we should have bought a 1200 RPM motor to run it instead of the 1800 RPM motor. The second comment is that it has a NO. 2 morse taper that limits somewhat the tooling size that can be used. What little I got to run it (when I was visiting home), I thought it was a good model makers mill. All in all I am looking forward to getting it set up again and playing with it and have some rotisserie motors for the table feed
I got a early mill/drill in the mid 80s (couldn't talk Dad out of the Benchmaster) and it is a little bigger and the R 8 spindle has a vertical feed which is nice. I use a Zerox takeoff motor for a table feed drive and have dial indicators to help on the 3 axis.
The rotating table was a X/Y table I took off the bottom XY feed slides and mounted it on a homemade horizontal/vertical base.