Well, it might not be a lawnmower on tracks, but it's about as big as one:

http://www.youtube.com/watch?v=HZk19V_mCAA

And some construction pics:

http://s154.photobucket.com/albums/s...ad/Sturmtiger/

I built this Sturmtiger in 1/6 scale to compete in rctankcombat (www.rctankcombat.com). I still don't have the paintball gun mounted, but hopefully soon. It already weighs in at around 100lbs.

Derek