The benefit of the wedge is to give you more adjustability. Which in turn will get you the proper angle of thrust to make your boat run better with more control. Now that set up did not work for me, that 2* down wedge, I will be going back to just the droop and see how that works. With a stock pump and no droop, I ran 7* up. That set up worked well. I ran 444 lhp on a standard Berk A impeller @ 5300 rpm, 74 mph. Now with my MPD B- impeller, I am moving more water, less rpm to plane and speed is upwards of 75 mph @ 5100 rpm. So depending on your set up, weight of your boat, cam, price of tea in China and the atmospheric pressure of hell, I personally recommend an MPD B or AB impeller.