Well, one last issue and this is really nit-picking.
The 3DO model of the "first flight" 688s shouldn't have the stern planes with the vertical slabs (like the 637 class).
I think that idea came from some early illustrations of what the class looked like or it may have been an early idea of how replace the original planes. The stern planes started out as a single piece "slab" plane when the Los Angles was first launched and I know they didn't stay that way for very long. Let's just say the crew came back to port a lot more religious than when they left.
Basically, the first flight boats are the same as the second flight boats without the VLS.
Hobby Boss has a 1/350th scale model kit where you can build any of the three "flights" and the early stern planes are included.