Xp8103, I understand what you say when you said you glued the wing with the upside down method, cause my 1st 231ex said glue it upside down, well my 1st one crashed. Greatplanes sent me another one, and during the assembly process they changed the manual and you glued it right side up with a dihederal block on one end to set the dihederal. This one has been great ever since. I think the manual was screwed up on the initial kits, and this is why so many people had problems with them. Daz...