Well...installed the Smart Tabs on our 2006 Q4 S/F Tahoe and took it out for a test run on Saturday. Acted like a different boat. The three main problem issues were corrected- 1. Bow rise, 2. drift a slow speeds, and (the best) 3. porpoising. The Smart Tabs corrected all three. I was a little nervous, but was completely sold after a few minutes on the water. Can't wait to use it again.