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Section 3: Aileron Control Horn Installation
Step 6
Remove the screw, then use a hobby knife, counter sink
bit, or 5/16” drill bit to taper the hole. This is done to
counter-sink the head of the screw into the aileron.
Step 7
Once the aileron has been counter-sunk, thread
the screw back into the aileron.
Step 8
Repeat Steps 1 through 7 for the remaining ailerons.