Teenagers are so conservative... Thanks a lot
Our team, 2083 actually made our arm/lifer out of kevlar(bullet proof, RIGHT ON!!) and it is amazingly tuff. The thing is a total of 20 pounds with motors. Only problem is it takes around 2 weeks to assemble. So if you have plenty of time and money, kevlar makes a great arm. (Note: you must also carve out a foam core for it to be strong.)