These work for me... Heavy 1652, Four Stroke 40 with trim, 8 gallons of gas, two batteries and my big arse in the back.... Jumps on step, the faster you go the less pitch is in the tabs. WOT they are pretty much even with the bottom of the boat...
I have had them going on two years and put them thru a couple of groundings at Toledo when the water was low, stumps on the river, etc...
Good luck
