Need mods for big ships. Like B I G ships!

When I say big, I don't mean something the size of a Saturn V; I mean something that can drop multiple Saturn Vs like bombs! I want to make an oversized aircraft carrier, and later, an oversized space station/mothership. I've already got B9 HX on my radar, and already have the OPT spaceplane mod. Is there anything else I've missed?