Gentlemen and ladies, though I would consider myself not well versed in fiberglass laminating I do consider myself as better than average in would working and finishing using various types of glue in various kinds of wood together. Weather hand carving a propeller using two different kinds of wood for looks as well as to ensure uniformity of the propeller itself or using one kind of wood in the construction of an airframe, the basic principle of gluing weather using resourcinol, t-88 or any other type of bonding agent is to make sure the joints are as precise as possible and the wood is as clean as possible end grain or sides grain included! Some epoxies have a filling it capability. Resorcinol does not! And is not widely used anymore except my us old folks! It is not rocket science. Just clean the sides to be glued thoroughly and get is uniform of pressure as possible on the glue joints and let set for the required amount of time! It doesn't matter if you are gluing a wing or a gusset the principles remain the same. Forgive me for stating the obvious here I don't mean to sound arrogant!