All good advice on changing the car. Dont forget car placement in the beams is equally important for consistant reaction times and consistant ET. Make sure you barely turn on the second stage bulb to indenty you are on the same mark every time. This can be a differance of 2 hundreds on the starting line and the finish line. Stage deeper in the second bulb you will go 2 hundreds quicker on the tree and run 2 slower down track.