Hi guy's... i have a 2000 Blazer 210 with a 2009... 250 Optimax pro xs with a trophy plus 4 blade 26" pitch. It's set 1/2" below the pad and can only get it to 70mph and she starts chime walking BAD. Had a 250XB on her with a 27" pitch and ran in the upper 80's. The hole shot was bad with the 3 blade on the xb, so when i bought the new motor i went with the 4 blade. Hole shot is great now... but cant seem to drive through the chine walking. any sugestions??? Thanks!