One of the design issues for Barrier Peaks of course is the cylindrical nature of the setting.
I've got a circular kitchen table, don't you?

Kind of like circular layouts myself. The ship itself is quite a bit too large to do this even in 15mm scale, but I've made RPG layouts in years past where the PCs were invading a wizard's tower and each floor's layout was built inside a large flowerpot drainage saucer. They come in a bunch of sizes, don't cost an arm and a leg, and these days you can even get them in a variety of shapes, including hexagonal ones. Worth a browse through your local garden center or online.