I have an eight foot fiberglass, lapstrake dinghy. On the bow plate, it says "Columbia". On a stern plate, it says the boat was built by R. S. Dorris Boat Co.. I am restoring the boat and need information on design of the rudder and leeboard. It appears that it had a sliding Gunther sail. I need iinformation on this and how it was rigged. I believe the boat was built in the 1960's and in Newport Beach California.