Hi guys , the computer programs are great for your initial ideas on geometry but you must have extremly accurate dimentions to put into it or as the tech heads say "garbage in= garbage out" I have had more success with my camber caster gauge and bump steer gauge as this measures whats realy happening on your particular car , it's not a fast process i spent 2 days jacking my wheel up and down and changing shims for the height and length of my modified rack to get a good result , when i asked a racecar builder friend of mine if i was on the right track he said he has spent a week to get a result. Unless you can measure in 3dimentions to less than .2 of a millimeter the computer prog is not accurate enough by itself. WARDS