Another thought is, I wonder if you might have a risk of running into your torpedo before it got up to
speed?
I have decided that in this build universe, the magic of whiffery has decreed that the boffins have come up with a way to extend the distance a torpedo will launch so it is outside foil zone.
Also the torpedoes may have become secondary armament due to the heavier 6 pounder mount due to your valid point about lack of viable targets.
Buildwise, on a bit of a roll.
Moving onto the base. It is a foam base, with some sculptamould base texture. This was allowed to dry then a couple of sheets of blue crepe paper was laid over the entire thing and then wetted down with diluted white glue, which added further "wavy" texture and a more merged surface.
After that had dried, the next step was a quick coat of paint to check it out and then starting to pack in more crepe paper around the hydrofoil business, only with water at this stage, because my logic says, I should be able to still remove it. We shall see if logic wins over reality