Hangar 9 J-3 Piper Cub Assembly Manual page 13

Section 4: Installing the Aileron Linkage
7. Use a 1/16" drill bit to carefully drill through the aileron at
the marked locations, making sure the drill is exactly
perpendicular to the aileron's surface.
8. Attach the control horn to the aileron surface using the
provided long 2mm Phillips head screws and the control
horn back plate. The control horn back plate attaches to
the opposite side of the aileron's surface, and the long
2mm screws thread into it, securing the control horn in
place.
9. Thread a clevis onto one of the aileron linkages — 16
turns.
10. Install the clevis in the outermost hole. With the aileron in
the neutral position and the servo arm 30° offset from
Step 2, mark the position where the linkage will attach to
the servo arm — a small piece of masking tape works
well for this.
11. Using Z-bend pliers, make a Z-bend at the marked
location. Cut off any excess linkage rod that extends past
the Z-bend.
12. Install the Z-bend into the servo arm (10-12 mm from
center).
Note: It may be necessary to slightly enlarge the hole in the
servo arm.
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