Tamar build update 28/3/15.

I have managed to shape and install the twin cooling water pipes, which "hopefully" will return the motor cooling water back to the outside, once it has cooled off the motor esc's. So these pipes now connect with the original engine  exhaust outlets, and run forward to the electrical panel, where they will connect with the outlet pipes here.

the cooling pipes now connect with the engine exhaust outlets.

provisional "loose layout" of electrical panel, "cooling pipes "seen emerging from underneath panel in centre of board.

layout shown with deck replaced on top, demonstrating ample hull access.