Hi John, I initially inserted the servos with the shaft closest to the leading edge but found that the push rods supplied were to short. I then went back and turned all of them around and they fit perfectly. I later saw a blog on this site that someone left them that way and used longer rods but the simple thing to do is just turn them around. As far as the flaps are concerned I am not sure what you mean as I had no problem getting the flaps to go down are you having a problem with this? I did try using a circular horn for the flaps but changed it to a standard type because the rod tended to bind and the keeper came loose in testing. There is some concern for me about aileron differential that I have been reading about. In other words a high wing airplane tends to have adverse yaw with banking and it is suggested by some that the ailerons should be raised a little more than downward deflection to dampened this affect but the manual instructions for set-up is equal upward and downward deflection so thats what I am using. When flying a real Super Cub one uses the rudder pedal as they say " step on the ball" to keep it centered to prevent this. This can be done in RCs by appying a little rudder when turning with the ailerons to have a coordinated turn and prevent yaw. Again I am just a novice at this hobby so better check it out for yourself.