that's what I meant with the notation I used, they are quite common:
- FF is the part fixed behind the bumper
- FR is the part near the steering
- RF is the part behind the motor
- RR is the part at the rear extremity of the car
Your RF is probably more like that
The +0.5 indicates that you must substract 0.5 to the FF block. It also exist in 0, +1 and -1.
You can also find split blocks like these:
