Hi, I'm new to this board and see you guys have a lot of knowledge concerning pontoons. I'm 6'4" 240 and am interested in a pontoon for floating rivers up to class 3 rapids. I am concerned about comfort,leg room , my knees, adjustability and the amount of drop on the foot pegs. Can anyone shed a little light on this subject ? what works for a tall guy? Which ones to stay away from? I will probably be buying a used one and am wondering what to look for. Thanks!