I run mine at 1/4" below the pad. This prop drives like a dream with 2 people in the boat. I would not say that it is only good for a loaded boat....but with a light load it requires more driver input than a 27 trophy. It has an incredible amount of lift and with just 1 person it really gets up on top. Usually I end bumping the trim down one tap once it reaches top end and this flattens out nicely. My definition of light load may vary from others. When I say light, I've got myself, 1/2 tank of gas, empty livewells, and maybe a cooler of beer, but my TM and 2 group 27s are still in the boat. I know some guys consider a light load to be TM removed, and running a small cranking batt. I can't speak for how the prop would run in that situation. The quad IV is the only prop I have now, so I run it with just me in the boat quite a bit and it is very manageable, just requires a little more work to balance because it rides higher on the pad than the trophys.