A few years ago I installed the 2nd version of the SE Compensator(40274-08A) on my 09 SG. I now want to install the latest version(42200064). This is the one that does not come with the rotor. It says you need to purchase rotor 30041-08A. My 2nd version compensator has rotor 30041-08. Does anyone know if there is any difference between the two rotors. I don't want to purchase SE Compensator 40100061 which comes with the rotor if I don't have to.