Cheers for all the help and comments people. I feel the tank is coming along quite nicely now.

I ended up re-doing the mouth with curves and lofted surfaces and it is working fine. I have now set up the limit information and set driven keys so that the mouth (both upper and lower jaws) open as I want.

I have added two chairs and the beginnings of a dashboard. There is going to be loads of fine detailing to do.

Below are my latest images. Next, the tracks at the back.

And to all of you that are leaving messages about how wonderful Thundercats was, I salute you. It was Tigra who had a whip by the way blomkaal.

Keep the feedback coming.