Ha, for some reason I didn't see all that post just saw the arrows and since those words were way down by the post date guess i passed it by thinking it was part of Cmark's signature area.... sorry.
I don't have the machine serial number just looking at a few pictures to go by right now. It is a D machine, and there's no switch in the right overhead panel, I'm guessing the switch that i would need is the one labeled that looks like a wheel going over rough ground?.
Also Left hand joystick has 4 buttons on top, Right hand joystick only has a thumb wheel and is missing 2 buttons, which some units appear to have along with the thumbwheel. So not sure what the two other buttons on the joystick would have been for.