Thanks guys ill get him to check the elevators but i think they are right.

Also his wing is dodgy as when you look at it from the tips(right wing) the the botom of the wing is symetrical but the top is nearly flat,its like they built it upside down.

He has tryed taping some card board to the bad wing to ROUND it some more and this helped a little bit but it still has the roll on loops.With out the card board it would roll coming near the top of the loop,not on the down side.