There are still, to this day, PREDATORS disintegrating in mid air, maybe as we speak. Not everyone is aware of the critical points that need extra attention. Every now and then, I intercept a thread about one falling apart. At the speed this plane flys at, you don't need much of a wing twist for there to be a problem. Mine came as a completely assembled wing, and outside of the fact that the covering seams face INTO THE WIND, it is a very nice wing. I guess HOAAA could try a trim tab at one of the wing tips. I have never tried to unwarp an ARF wing like this, so maybe a trim tab is a good compromise?