I have the alpha 40 arf and the rtf the rtf does not use glue to join the two wing half's together in the instructions but the arf does however that being said it is a good idea to use some 30 minute epoxy on them but i also use 12 rubber bands when flying not the suggested 8 that is called for in the manual. Ive heard of the wings trying to depart from the plane in windy days with the only 8 rubber bands.

Chris