I'd never been particularly happy with our bunks on Rum Tum, they are quite narrow and not long enough for me (I'm 6'4") and worse of all was the noise from water lapping between the hulls. Many a night I gave up and slept in the saloon.
Anyhow after one sleepless night too many we started discussing a plan to convert our saloon into a large double bunk and saloon. The saloon itself could sit 10 comfortably which seemed a waste as most of the time there was just the two of us with maybe two guests. After some careful measuring we came up with a plan to convert the saloon as required but with the ability to convert it back easily if circumstances changed, following the traditions of the Royal Navy by fitting removable bulkheads.
Photos below of the transformation.