"CASTOR" is one of the main Causes of Vehicle Deviation. And Castor's Reasonable Adjustment can Improve the car's Stability and Comfort greatly. However, Many wheel Alignment Master dont understand this angle's design and Principle. This video focuses on supply more training on the principle of "CASTOR" and Troubleshooting. Believe that when we really understand the exquisite design of Castor, we must Can solve many of the so called "crisp deviation" phenomenon. But also to further enhance the owner's driving experience.