Harrison Alpha “U” Slant bed type – anyone familiar?

Never seen one of these in person, but see them come up for sale occasionally. Maybe possibly might consider buying one, but cautious of the unknown.

The bed arrangement is very unusual, looks like a flat top dovetail bed, with a single linear rail tucked in down on the front, and I guess the ballscrew somewhere inbetween. Can’t find a single diagram or photo without covers on google.

I’m guessing this arrangement is probably pretty good for accuracy on light cuts, and probably pretty bad for rigidity on heavy cuts.

Anyone ever been near one of these? Any insights?