I'm really not sure what catapult would be best. This is an area that's not very well documented even on some of the USN cruisers.
It's up to you. At this scale it's not that big of a deal though.
I could try out the Omaha catapult and see how that looks. And then judge what seems to fit the most.
Great work, Karle...are Arkansas & Wyoming next?
Yes, unless I find other important steps in the evolution of the already drawn ships, then the Wyoming class is next up.