I do these type of wings for customers all the time.. I make a small piece of light ply for the block to set into and then the light ply slides into the foam also. I do all my skins with polyurethane glue and then I also have a carbon strip That ties into it all. If the customer wants i also put a small piece of carbon vail in the area.. no problems yet..

don't for get we do custom wing / stab work and short kits.

cheers,

scott
www.rcfoamy.com