Broke 3 lower arms and one upper arm on my MBX6T. Yeah, you'll hear some of the fanboys say there is nothing wrong with the truck, and to drive more carefully, but hey, its 1/8 offroad and sh*t happens. I've put the same amount of wheel time or more in my RC8T, and lot of other 1/8th buggies and I never had an arm breakage issue until I built up my Mugen.
I slapped on some MBX5T lower arms on my 6T.....lets see if they hold up a little better...