http://www.bobsmachine.com/
i dont have an agenda to push these, but i have one on my big lake boat and love it
I can put the tabs down just a touch come up on the jack plate 2 inches and trim out a little and hold the nose of the boat up but still dampens the chop while maintaining speed.
Also tabs all the way down and jackplate all the way up, trim all the way down, for shallow water holeshots. big big difference, did i say big?