Just to add some comments about glues and weights, on my LT-40 I did use mostly med CA. Pretty much a full 2oz bottle of it. On my control line projects one of those 1oz bottles will go bad on me before I used them up. Yes, I've heard CA is heavy and if that is an issue then I'd certainly opt of a lighter water based aliphatic wood - especially on the joints further away from the CG. Engine firewalls always get epoxy.

One company does offer a very thin watery aliphatic which is supposed to wick in like thin CA but dry like aliphatic (i.e., Tightbond or Sigbond).

Windy Urtnowski builds some of the most gorgeous silkspan and dope finished C/L stunters you'll ever see. He sells hundreds of thousands of construction, finishing, inking, buffing and flight trimming videos worldwide. On his glue joints he'll use Q-Tips to wipe away the excess fillet. There is very little strength added by gobs of glue outside a joint but really does pile the weight on. He says he uses a full box of 100 X-Acto blades and a full box of Q-Tips on every model he builds. He is one of the few people who earns a sustainable living with this hobby.