I spoke to Jeff about my boat's performance and inquired as to how a different propeller might make an improvement. Jeff took all the data I had, boat specs and engine performance with the original prop, and calculated exactly what prop might improve our situation. …the boat's observed "no-wake" speed increased (surprise to us) from 6-7 MPH up (and 3.6 mpg) to 8-9 MPH (and 7.4 mpg). …”holeshot” from idle speed to 30 MPH…is at least 50% faster…at 2000 rpm is 49% faster with 46% better MPG, and at 3500 rpm is 17% faster with 26% better MPG…optimum cruising MPG increase of 12%. In summary, we are very impressed with the PowerTech OFS4-Blade propeller, the technical advice that came from Jeff. Most impressive is the performance of the prop; I predict it will pay for itself in fuel savings in just this year’s boating season and it will always give the boat a new level of performance. Thanks for doin it right!"