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So I printed the hull and figured quite a few things.
I had to modify the motor mount for my first tests (outrunner not fitting the current mount).

Now I have a question: It seems to be super hard to find a sterntube with 3x4x120mm.
Any idea where I could purchase one? I'm in germany btw, might help with your suggestions.

Also I was struggling a bit with tollerances here but I think I can even out a lot since I'm going to epoxy the whole hull anyway.

Most likely I will try the version with propeller first as I cannot go with the under water one unless I find a way to seal it.
I dont have any tube fitting.