Ok this may have already been done but my search produced no results so here it is.
Caster is the angle to which the steering pivot axis is tilted forward or rearward from vertical, as viewed from the side.
Camber is the angle of the wheel relative to vertical, as viewed from the front or the rear of the car.
To see if your ZipZap needs this correction, place your car on a table and with the body off. Look at the front of the car and make notice of the wheels. If the angles look bad and rest assured you will know, you may really need to do this. I did mine and WHOA what a diffrence.
Click
Caster/Camber Correction for complete instructions and photos.