Here's the underside and the parts that aren't the base needed reducing so that they don't contact the top of the slide.
The top part... cylinder shaped... probably would have popped off if I had really continued to force the base into the dovetail! I think it's silver-soldered onto the base. I was just winging it with a small triangular file and the reduction isn't as uniform as it should have been. I blued all of that before final assembly.
Wynn