RE: GP Super Stearman Advisory. (Complete.)
It's the June issue #215.
To correct the binding problem, move the control horn on the upper aileron back until the mounting base is 7/8" from the trailing edge. This will allow for enough movement up and down. The bottom control horn as per step 9 (pg 18). Mine came out 1 1/8" to the base.
Hope this helps.
Larry
AMA 11269