I have gone to mostly using Titebond as I have found myself very susceptible to the respiratory problems with CA. I do use some CA as well, since there are times it is best for(especially quick repairs, I think I will pick up some of the little ones as someone mentioned.) Somewhere on here I once read that Titebond dries lighter than CA because the water leaves as it dries, while CA cures. However, I can't imagine that it would amount to a big difference in the overall weight of the plane.

As far as what to spread the glue with, I have accumulated a large pile of used gift cards that I use. I can cut them down for small areas. And I have also stuck adhesive backed sandpaper to a few.