uses a simple 8 inch long steel bubble level placed on the flat rim of the wheel. He has 53 years of alignment experience with race chassis set up and street cars. I asked him once how he was able to read it and he simply replied that one degree of camber was equal to the width of a dime in bubble movement! For many years he did all of the 300 ZX alighments for a large Nissan dealer until semi-retiring. Always operated a one man shop, you always booked three weeks to a month in advance. His shop is now at his home in Franklin, NC.