I just discovered this thread and I was astonished by this project to add new models and possible new playable models to the game. I can't wait to try out some of your proposals.
But if I can, I'd like to add a u-boat to your list, if you have the time. The type XVIII Walter boat. It's hull design was used for the Type XXI so modeling it shouldn't be a problem. There are just some characteristics that make this boat formidable, for one its under water speed of up to 24 knots. More information and technical details can be found at uboat.net and many other site. I'm not insistent on this but perhaps you could consider it as a later project.
Regardless of whether you accept my request or not, I am looking forward to your progress.
