yeah i make everything bout as small as i can
the wtc will be made of a small plastic box silicon sealed
it will use six motors (i found some water resistant micro motors!, they are enclosed in a plastic housing and the output shaft has some sort of seal on it) i guess its not really a sub but more of an rov.

ive tested all my electronics and motors to 10 feet with no leakage, im all set there
its just the hull im having trouble with