E-flite J-3 Cub 25 ARF - Manual (Page 32)

 4. Measure from each tip of the stabilizer to a point
at the forward center of the fuselage. Adjust the
stabilizer so both measurements are equal.
" "
""
 5. Once the stabilizer has been carefully aligned,
use a felt-tipped pen to trace the outline of the
fuselage onto the stabilizer.
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