i had the same problem you did Bill with the car twisting with wheels in the air. i fixed that by (with the car on the ground) take a bolt of of your top bar on the passenger side. you get in the car and have your dad turn the bar till you can put the bolt back in. that resets your preload and mine left straight and level and didn't have a problem on the top end. this sig pic was before i did it i have one of after.