The wing mount comes out because its not secured in correctly and there is a gap between it and the wing suface allowing you to overtighten and put excess force on the hold down.
You do have pins in the front of the wing as well.
My 8/32 t nuts fell out so replaced then with 1/4.
GP Pitts uses nylon bolts and the wing is far from secure on those.
I hear you on the landing gear...I tried it once on another model and after a few landings the gear fell off. There is no way to know if one is on its way out and about to break, some are even hollow due to manufacturing defects.