Any of the alphatic resins work well, I use Titebond II all the time. I've also used Elmers carpenters glue with good results. I personally think that the alphatics are much stronger in some cases than the CA's, especially under shock loads like we get with those sudden landings although I've never done any scientific tests to confirm that. CA joints tend to be very brittle and often do not work well with hardwoods. Yes I know balsa is technically a hardwood but it does not have the acedic character of oak, pine, spruce etc.