No plans. You have to order one. Mine is hull # 50 and was built in 2000 and my dad had hull # 12 or so and that was in the early 80s so you can tell he only builds a few a year. I get up on plane fine with me without a doelfin, I just run my gas tank and any other gear up in front of the cockpit to balance the boat out. Be careful if you use the doelfin, my father had the original, less deep, fricke and ran it with a fin once, caught an edge and almost got thrown out of the boat.