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I do my own in the garage with a different method - I'll try to paraphrase it.
First, level garage, correct tire pressures. I have a long peice of angle-iron set up on the front wall of the garage that pivots. Also 2 wheel inserts I made from hardwood with a steel C-channel on the mounted to their outer ends.
I bungee the two C-channel assemblies to a front and back wheel, usually left side. I then place magnetic targets on the center of each channel - front one has a small hole one inch out, the back has a mark one inch + half the front/rear track difference, 1.85" I think. I am doing this with the car set up on the lift -- I lift it up about 5 feet and place my magnetic laser level on each C-channel pointing at a washer on the floor, then spin the tire 180 degrees and check the dot is still in the washer, so I know my rig is square on each wheel. Back on the ground, I set the laser on the angle-iron in fromt with a 90 degree splitter and adjust the laser and angle-iron until I sight through the hole in the front wheel target and hit the mark on the back target. Once set I clamp the angle in place. The 90 degree splitteer on my level pivots, so I turn it to face the angle and mark that as ZERO. I than mount the level on the front wheel (the beam is one inch off the magnetic base) and point to the angle-iron. The angle-iron is 8'4" from the front wheel centerline when on my lift, so the correct toe works out to 0.4 to 0.9 inches inboard of the zero mark using some trig on the diagrams in the green book. For the other side I just attach the rig to the front tire, mark the zero on the angle-iron, then mount the level on the wheel since the angle-iron has already been squared to the car.
For camber I rotate the wheels so the C-channel is vertical and use my digital carpenter's level and read off the angle directly.
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