Happy to contribute, Bob.
Nice work, Buzz. I like the way you tucked the lower serifs together - I was thinking of something like that as a next step. I didn't want to get deep into a design only to have everyone yell Ooh Yuck.
(If you're going to keep working at a layout, I suggest you work at a plain B/W high-res design that can be adapted into a finished medallion, and create the pictorials from it. It's hard to go backward from comps to a precision layout.)