Nazi site eh? Well unless they changed the Tmaxx site without telling me, this must be a different phoot.
About the tracks, just do kinda what they did but beef up the parts. If you use a small drum like they did to drive the belt you'll have automatic gear reduction. I'd say your maxx wouln'dt go more than between five and ten mph. At any rate, that'd be cool to see.
I re-read your post. I get it now. heh.