Home Alignment for Porsche 911 , by Ray Scruggs, its a booklet with step by step instructions on how to do a 4 wheel alignment, ride hieght, corner wieghts etc... and the proper order to do them in, its the best $10 bucks you'll ever spend on your car. No special tools required, after the second or third time you do it it will take only a couple or 3 hours and the cash you can and will save is big, like it says in the booklet if you can't do it all your out is 10 bucks, to me it's a must have. If you can't find Rays e-mail then send me a PM and I'll dig it up for you.