RE: 1/6'th scale tanks
Steve-- Thanks for the correction. I misread the rules. Some of these tanks can be absolutely massive in these larger scales.
If you haven't checked out the noted site yet you should. It has lots of great tips and techniques for building these behemoths and constructing tracks (which was the most daunting part in my view until going on the site) and lots of cool video clips.
All in all, the best and most helpful site with regards to getting a big shooting tank up and running.
Mike