LT40, the problems with your plane are most likely an isloated case. Many people including myself have had very little problems with the plane or the wing. I just flew mine again today and I have a .61 in mine with no mods to the wing. It sounds like you got a Monday or Friday plane (sucks). But the plane overall is decent quality. If you epoxied the wings together properly (or as best you could with yours) you should be fine, but as steve114 said you need to have your plane checked by an instructor (if you had problems building it or not).