Hi. I have looked into this further and all i need to do for 3 gear MM is take out the spur gear shaft and turn it round as the car comes 3 gear RM and all the plastic parts come with it all but two screws. Can someone explain the benefit of 4 gear when the added gear is the same size and does not seem to gear it up or down but just reverse the motors action if you want the motor on that side of the car also this puts slightly more load on the motor for seemingly no gain. I,m gonna do it today and put up a pic here of the final result.
