Does anyone use, or previously used, automatic trim tabs? My boat is rear end heavy, and could benefit from a bigger engine. Unless there's just a few of us, and not all sitting in the rear of the boat, it can take a little longer to plane out than what I would like. And of course it's worse getting tubers started. They claim it helps to offset weight if there's an odd number of people, or the heavier ones sit to one side. One concern is that someone could cut themselves on it when swimming. Are these worth it?