Thank you very much, Gaizokubanou and icecreamslick. It is incredibly frustrating, to have it working so well in every way except this one. And it is such a great tank. I feel like my Leopard falls well within the theme for this thread: "Leopard in MUD"!

Once again this evening I started to look at it again, checking some of the connectors and so forth. But I just can't figure out what the problem is. I rechecked the manual and one of the motors is a dedicated steering motor, the motor on the right side of the tank. There has to be some problem there. It may be a problem with the cable connections under the hull, but I don't want to open up the hull [:'(] unless I absolutely have to.

I will try to contact the guys you mention; in fact I already emailed tomzag today. Tomorrow I am going to try to speak with Gary Demory of Tamiya USA.

Thanks once again everybody.