Ptolus in "Gazetteer of the Known Realms"

I'm thinking about getting "Dungeon Crawl Classics #35: Gazetteer of the Known Realms" as my next purchase. I know I plan to include Ptolus in my next game too....so since I haven't seen "Gazetteer of the Known Realms" yet, will they make a good reeses? or will I be annoyed at peanut butter in my Chocolate?

Praemal explicitly has undetailed areas to the west, east and south, and the Known Realms has explicitly undetailed areas to the east and west. It shouldn't be hard to paste edges together.

Dropping Ptolus into the middle of the Known Realms would be a little harder, but people have done it, I believe.