I have been busy this week doing background stuff.
I have been discussing engines, cooling , gearboxes, drive gear, bow thrusters, with a very helpful chap. I had originally wondered why my shell had been built with a mud box instead of keel cooling. On deciding on the engine power (I want around 90hp) it was clear after running a calculator that I could not put efficient skin tanks in. 90hp needs 22.5 sq/ft of contact area. Realisticly this is going to be a non starter. So it looks like the mud box or raw water cooling via a heat exchanger is going to be the answer which is why it has a mud box.
I have also ordered the windows. 8 off 36"w x 24"h Dutch barge style windows and 3 off 18" port hole windows.
Building a boat is more than just tools and graft. There is a shed load of research too, especially if it's your first one.
I have also bought an inverter. Probably a bit premature but it was a good price so it can go into store for now.