I have an '07 VLX, and I could get a great wave just out of stock ballast going 11.6 MPH. And I don't even have the bow ballast. Over the winter, to get an even better wake, I plumbed 750's in the rear lockers and I will put an 800# in the bow. Also, I was using the power wedge (about half way). The only advise I could give is to fill the center ballast completely and increase speed to over 11.
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