Not that she's my boat, but here are my thoughts on an interior: v-berth with removable insert forward, followed by a 6' settee to Starbord, 4 1/2' settee to Port, just aft of the Port settee is a small nav station facing athwartship with space for a laptop, aft of the nav station is an enclosed head with shower. (the head has a teak grate you can flip down over it so you can take a shower sitting down without slipping!) Aft of the Starbord settee is the L-shaped Galley, complete with a woodburning stove/heater.
Definately an inboard Diesel, with an engine compartment so well insulated you can happily sleep in the v-berth and barely hear it.
But that's just me. Hah!
Looking very good Sir, thank you so much for documenting your build. It helps us rookies figure out things even if we won't build that exact design.
So far I have only built a Spindrift 9N that isn't even launched yet, but I have the boatbuilding bug for sure!