RE: epoxy and blind nuts
I agree with the tape guy. Another solution: leave out the blind nuts completely, mount the ply, drill and tap the plywood and put one (1) -- I mean ONE!-- drop of thin CyA into the tapped hole and wait 24 hrs before threading a bolt or nylon screw into it. Shazzam! Not recommended for engines, but will hold servos in place forever., and weighs less. JGO