I think it should be EGA, too -- ot maybe that's an old multi-scan monitor? CGA has 200 lines only, while EGA has 350 -- very close to the Compact's 342, so it's very likely to work OK.

Anyway, it's a very interesting work! I see that you can choose between straight and inverted signals for H-sync and Video... which are the 'proper' settings? Maybe you'd like to use a couple of your unused inverters in series for the "straight" video connection -- just in order not to overload the Mac's output in case someone likes to get a bright white image (the four inputs in parallel!)

Thanks for sharing!