For RM3 set up, you can down load the set up from Billy fisher on the TD website, I believe under USA track section, that should give you a good basic to start from. General rule of thumb: if you are changing from MM to RM, you will need a softer front spring and a stiffer rear spring compare with what you are using in order to achieve the same balance since on RM set up, the motor weight are bias towards the rear. Hope that help.
