The C15 floor folds up and drops into the cab easily enough. Bits of the sides fold down to support it off the footplate correctly. All the way along the sides except where it crosses the doorway, where there is an unprototypical gap.
Never mind, etched kits contain the solution and a couple of lengths of spare etch from the side of the fret were quickly soldered in place to make up the deficiency.
It's for this reason I keep some strips of metal chopped from old kits in a drawer. I know you can buy strips of metal but my eco-credentials are much stronger for doing it. And my Scottish blood won't let me throw away something that might be useful !