So they flying very well, I have some problems with flaps hinges and one alieron got stock on the wing side, make sure that if you build one do the flap push rots internally not the recommended pay manufacturer and reinforce the area that holds the live hinge because it flex and could catch the upper wing skin, other than that it’s a very good flying sport model, I’m more interested in scale jets and this one is way too big to handle by one person when assembling on the field before and after flying