Fit fiberglass rudder bottom to bottom of rubber by endless trimming of the fiberglass. Used a cutoff wheel on a dremel tool for this and it worked well. The cut lines shown on my piece of fiberglass were pretty close.
In installed K1000-6 nut plates to rudder to enable the fiberglass piece to be removable in order to plumb nad service the wires to the Aeroled Suntail strobe light.