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. With the push rod installed I cannot get the recommended 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 recommended throws, so the ailerons themselves 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. I am using two servos in bottom wing only and slaving the top ailerons.[] Can anyone help?

Thanks
j3cubflyer