RE: Best building glue
You've heard all the pros and cons, recommendations, cautions, and what-not.
By now you've probably figured... It's your choice.
It all depends on your preference.
My preference has changed since I started building. At first I was all CA. Now I'm almost all Alphitic. Now, I use thin CA to do hinges, and reinforce screw threads. I use 30 minute epoxy on F1s, and tailfeather attachment. Then again, I'm not in a rush to slap a plane together either. I'd rather take my time and have the plane turn out nice.
Good luck, and happy landings....