Ok, I just bought a ready to fly H9 Extra 330L, with a 3W85 twin, and 8411's all around. Now just as soon as it was delivered, I hear about it not being flightworthy without a few mods to the wing. What is this!?! Mine is the 4 servo wing version, whats wrong with the plane?

I would however, Like to convert the wing mounting from "4-40 screws into the tube", to 1/4-28 bolts from the inside of fuse. I'm sure this has been done, what is the best method for this? How much stress would there be that could be harmful?

Is there anything else I should know about this model before I finish and fly it? Any help is appreciated! Coulter