Hey, this morning when I was learning on my T-Rex 450, one of my learner landing balls snapped off and caused my chopper to lunge forwards. Luckily, I only bend my main shaft, minor damage to my blades, and destroyed my SF mixing arm.

However, my question is should I order a metal or plastic SF mixing arm? Say I do get metal, would this break or bend just as easily as the plastic?

My other question is (for someone who has built a T-Rex 450): What holds on the tail boom? My belt was tight, and after my small crash (nothing even touched the tail) my belt was extremely loose? What holds on the tail boom, because all I can see are 4 non linking screws that bolt into 2 pieces of plastic - This can't possible be holding it ...

thanks,
Matt.