I'm putting together an '82 H16 with piece parts from three different boats. I have three sets of rudders. One set is a hard plastic or fiberglass material which is fairly light. Set two is also a hard surface material but seems to be a lot heavier in weight than the first set. The third set is also heavy and dense but has more of a rubbery or hard vinyl feel to it on the surface. Can anyone tell me what I have and which one I should put on the boat?