Re-enforce the 2nd generation rudder

My favorite rudder is the 2nd generation beaching.  17 inches longer than the 3rd generation, it has more lift .  It also has forgiveness should a grounding occur.  Now balanced and with a good working hold down system, its a great performing rudder.  However, it has some horizontal cracks just below the rudder head.  I don't know if these are crazing cracks do to normal flex of the fairly thin rudder or if there is actual fiberglass cracking.  If its determined that the cracks are structural, my plan is to remove the gel coat in the area and apply carbon fiber reenforcement.