Thread: "Top Bunk" for a Moog rack.
If you stick to things in the smaller range from companies like 2hp, Ladik, Erica, Zlob, etc, you can still jam a load of functionality into that third tier. Right now, you've got 24 hp to go after the Maths, Veils, and a uZeus go in, but with the very tiny stuff, you can do a lot. One thing to be careful of, however, is module depths; as I recall, the maximum depth on the Moog 60hp boats is not too generous, so you'll have to be very careful with that one limitation.