As I stated... I have 9.6v 3300mah NiMH batteries and I did try it with a Systema Magnum Turbo motor. I realize its not the High Torque Magnum but it still has better torque then any stock motor, I believe. After replacing the spring with a 120 and cycling the gearbox without issue.. I can only surmise that for some reason my batteries are not suited for this application. I just find this very hard to accept.
I may as well pick up the high torque magnum and add a cell or two now. Meh.. what-the-who... its just more toys.