Has anybody had experience using both of these in rivers, and able to offer an opinion on which is better for use with fins? What I've heard from a couple WaterMaster owners is that with the flat design the WM holds its orientation with little effort from the fins when you are drifting down a run, for example, casting tight to the banks in the summer on the Yak. I like the raised bow and stern on the Freestone for choppy water, but wonder if that would make it want to turn more than the WM. My pontoon boats are notorious for that - they turn on a dime, so it is really a chore to keep them oriented in a fixed direction. I'd rather buy the Freestone, as I think it is a much better value, but it has to do what I want.