I put Jan'so snowbird setup on my car,but having a problem getting the correct ride height on it. His setup sheet says he has 4mm shims under the arms and he is using the Pit tires and his front ride height is 3.8, but with 4mm shims under the arms on my car and with either the Pitts tires or the CRC tires I still only get 2mm ride height. Everything else is the same. Am I missing something or is his setup sheet wrong?