[THEFERMANATOR]

Fins work, period. I've added them to several boats, and had good results, but they're not for every boat. I added one of the aluminum permatrims to my skiff, and actually gained top end speed while reducing my porpoising. The main function they serve is to redirect the prop wash above the prop, and direct it downward. This is how they help down low. And if your engine height is correct, they add very little if any drag on the top end because they should be pretty much out of the water on plane.