Something I forgot to mention, the wings need to be very nearly (or perfectly) symmetrical. Obviously. Not trying to condescend here.. Sort of thinking out loud...
Anyway, to help with this I made my LG cutout template so that it lined up with the leading edge and root of the wing. This way the cutout will be at the same place on both wing halves without the need to measure...
Idiot proof, sort of.
W
Shawp dawg still on duty...