Nice Sketchup skills! Are you building a FW (13.6kgs) if so then it's worth pointing out that there only 1 full combat event (i.e. with spinners) a year, and that's the international champs.
I built a saw bot a few years ago, and although a good laugh was largely ineffective (the blades just stop the moment they touch anything) and the braised tips on the blades just fling off (be careful when testing at home).