Originally Posted by grippgoat

Finally, use a hex driver under the rear of the chassis in the balance hole and lift the chassis slowly. Verify that both rear wheels lift off the board at the same time. If one wheel lifts first, that means you either got the left/right balance way off, or your front end is tweaked. Tighten the diagonally-opposite spring, and loosen the spring on the same side of the other end of the car. When both wheels lift at the same time, flip the car around and repeat while lifting the front end.