I'll be very interested to follow this thread.... There is so much load transferred span-wise to the sheeting from the center outward. Any weakening, or separation and re-gluing of the sheeting concentrates forces (again, at least in my experience). If the sheeting is well-adhered, and solidly glued to the foam, I'd be really concerned about tearing into that.

Some believe that a wing tube socket must be mechanically "tied" to the top and bottom sheeting, and at a minimum, overlayed with fiberglass or CF cloth "spars" running spanwise to distribute loads from the tube socket area along more of the length of the wing.

Recently having a tube socket separation in the wing, I know whereof I speak concerning load concentration....and distribution.[]