Darren, This is a great starter kit for a model Submarine. It is also a fun model to try scratch-building a bit of detail. Too bad there is no 1/240ish scale AM stuff for it.
It's an easy kit to turn into the Balao class too as the Conning tower is already correct for the Balao.
You're doing a nice job on the assembly. Check the WEB for some Camo painting ideas.
Here is one:
I wanted to suggest you might want to get another one of these inexpensive Lindberg kits to have some extra fun. The kits plastic top deck sits a bit Proud on the hull. On a real Sub it would appear flush, bow to stern. A simple "fix" could mean just adding some plastic sheet to the bow and stern to meet with the deck.
The deck and the Hull should meet with a more rounded edge too.
Just some ideas for the future.
Nino.