Extreme Flight YAK-54 ARF, Instruction Manual

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3. Insert the 2 control horns into the base plate as shown in the
following picture. Carefully insert the control horns into the slots and
push down until the base plate is flush with the control surface. Use a
fine tipped felt marker to trace the outline of the base plate onto the
covering. Remove the control horn assembly. Use a sharp #11 hobby
blade to remove the covering 1/16” inside the lines you drew.
Do not
cut into an open bay area. Make your cut only where there is
sheeting below the covering.
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