I am building a Great Planes Super Stearman and having trouble with slaving the top wing ailerons. I have located the control horns as shown in the construction manual, but with the push rod installed I can not get the recommened throws. Has anyone else ran into this problem?. Is the manual wrong?. With the push rod removed I can move all four ailerons up and down much more than the recommened throws, so the ailerons themselfs are ok. But when I connect the push rod between the lower and upper aileron and try to move the lower aileron up and down I only get less than a half inch. of throw. Can anyone help?

Thanks
j3cubflyer