It looks cool indeed. I'm definately a fan of elegant machinery. However if I were a general, I'd place a call to IKG (or whomever makes industrial grating these days) and ask for their loosest mesh. (Yes, I have broken a heel in a sidewalk crack... and those tips are even pointier.) They'd sink into loose sand, too, but it wouldn't be quite as wrenching. If one tip breaks, the whole machine should go off-balance... even with gyroscopic corrections, it shouldn't be able to walk on 2 legs. Attack plan 2 involves powdered graphite (or other dry lubricant). I'd want a helicopter pilot from 'Nam... somebody used to spraying nasty stuff and getting up and out of there before getting caught in the draft. If all those joints loosen, the machine won't stand. Attack plan 3 involves sugar. Sugar in a gas tank locks things tight. Sugar and water is a mean combo. If they use their heat rays, they make caramel... sticky, gummy, caramel. Attack plan 4 involves salt water. Brine is quite corrosive. We can make water drops on forest fires... just make a drop on these guys. Being built on a desert planet, the odds of anything being water-proofed are quite small. My role-playing characters have built and disposed of several giant robots. There are many ways to remove mechanical menaces which do not involve futilely shooting at a hard shell. Carolly Evil OverMistress of the UnderDark