RE: Titebond glue
I use Titebond almost exclusively for my balsa models, most of which are quite large. I've use all three types with success but slightly prefer type II although type III is also good. The original is great unless you are going to have a lot of moisture in or on the structure at some time. Type II sands a bit easier than type III. I've also had good luck with Elmers Carpenters Glue.