I have just purchased a 1977 Montgomery 17...boat number 250. The centerboard is lowered out of the shoal keel by a rope which protrudes up through the cockpit sole just in front of and outside of the companion way hatch and coils around a vertically mounted sheet winch. The rope is badly frayed just at the point where it exits the cockpit sole when the board is in the fully raised position. Has anyone had any experience replacing such a rope. I want to know what I can expect when I have the boat lifted. After lifting the boat and lowering the board, I understand there is a pin at the rear of the board which must be hammered out in order for the board to drop clear of the keel enough to unfasten the rope from the pennant attached to the board. Any information as to the exact procedure and what to expect will be greatly appreciated. Phil Barilla