I like the little story behind it. Really nice concept. In keeping with your ideas though I was wandering if you would think its a good idea to change the placement of the 50 cal ? like eather higher or on the sides somewhare becouse it dosn't look like it has any defences that could like take something out that gets close to its legs ? If I was up against that I would send just a person to sneak out from the corner of a bilding and put some explosives on the legs.