Accuracy speaking ... it's enough. You already are at the accuracy cap I guess.

For gunnery vets will help you hit the cap earlier. I doubt they do more. I'm not sure how it would be for fighters.

Well, right now your spread is tight because you're at cap or just a bit above. On higher levels the spread will get worse, because your sailors will be too much above the acc cap. To get the spread tighter you'll have to burn experts. Find a way to calculate your true ability and cap and after level ~80 check your gunners every time they level up. I've experienced that last week - yellow guys had like 5x tighter spread than my premium elite MN gunners. Yellow guys - level 105, prem elite level 109. After burning experts to get my sailor's true ability around 100k above the cap the spread was comparable to the yellow guys. Keeping your true ability less than 100k above the acc cap will provide you with best spread. Been there, done that :)

http://imageshack.us/photo/my-images/802/kmaagunners.jpg/

I wish my aa gunners were originally ellite repair.


And yes, I spend 0$ on these guys.

Stop at 100 Vets for the gunners and put as much vets as possible in supports.