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If you print the solid part of the hull interface in spiral vase mode (without bottom layer) you automatically will get a hollow part. It is the ring profile that connects the front, middle and the back hull parts.

It is no problem at all to print the hull robust and watertight that way. Of course the printer must be good calibrated.

Yes, you can print the nose with infill if it is easier for you.
The other hull parts should be hollow, otherwise you can't use the interface for better alignment and gluing.