A 3-lb combat robot, really just an update to upChukk with the following mods:
new motors (actually, motors scavenged from Chili Fixins)
better armor: 3/16" 6061 Aluminum
hardened weapon shaft
possibilities for new weapons: mini saw blade, mini grinding wheel. (I found these at Harbor Freight; they have 1/4" bore -- which matches my current shaft setup).
horizontal saw blade (it just might happen, folks!)