It was clear from the outset that one Tantive IV diorama set was not going to be enough for what I had in mind. Suffice to say that in the end, I purchased 4 sets as well as making contact with an eBayer who produced 3D printed flooring pieces that worked well with the diorama. The end result was exactly what I was aiming for - a corridor with doors at each end and with doors each side of the corridor halfway along its length.