On balsa and plywood airframes I only use thin and medium CA because it is fast, easy and safe to use if you use proper ventilation, it's lightweight and is much stronger then balsa wood or the first full ply of plywood in the first place, and the thin CA soaks into plywood and balsa wood further then 30 minute or 1 hour epoxy anyway so there really isn't a valid reason for me to use epoxy unless I am using laminating resin for wing skins to foam or part manufacturing from a mold.

Bob