I have checked them and tried to balance the plane with a rig I made to see if one wing would drop and got nothing , i have see a couple of people on this site complain about the same thing.. There was just to much left trim to get it to fly straight . I don't like having to fly it that way . It will be a while before i fly it again , I have some other work I have to take car of but when I do i will give the results , I'm starting with a 2 oz. weight to see if it makes any difference . Thanks for the response.