Very good to hear that there will be more ships coming in '45. Join the Navy and see the world.
Doug: I just touch both ends of the sprue to a little pool of glue, and then try to pop it into place. Usually doesn't work and I have to tack one end down separately. Tweezers are helpful (I find them necessary) to hold the sprue while you work it into position. I have a kind of broad nose tweezers; needle nose tweezers seem to pinch the sprue too much, sometimes leaving an unwanted bend. But that just might be me being clumsy.
I hadn't thought about the lines being smooth, but I think the trick is not to get glue on the sprue-line to begin with. But if you do, and if you use white glue, you should be able just to wash it off by gently "painting" at it with a small brush dipped in water. Once white glue is set up, it seems to hold as well as needed, but until it does, it's generally easy to remove it completely and start over.
I'm too inept even to attempt using CA to attach rigging, so hats off to you for accomplishing it!
Personally, I find Aleene's a little too thick for attaching sprue (but more power to Eric since he can get it to work), so I use plain old Elmer's school glue, and sometimes I even thin that down some.
Believe me when I tell you that I'm no expert--just pig-headed and persistent. I went through about nine feet of stretched sprue, just to get done what little I've posted. Either I drop them and can't find them again; cut them too short; have them break when I tighten them; mislocate them on the ship where they end up not quite where I want them to be; the cats run off with them; or encounter some other pitfall that requires re-working them. That's why it's important to walk away before you get too frustrated and sink a ship that the Japanese couldn't sink in the Pacific.
One other thing, too, if you don't have black sprue or line, you can color the sprue with a black permanent marker. It's what I did. Just tape each end of a long piece of sprue to a piece of paper or cardboard and carefully run the marker over it. Be sure to check all sides for coverage.
Otherwise, it's just practice, practice and more practice.
Continued good sailing!