I got an MBX5 second hand here, brushless conversion so I can't adjust brake bias for more steering, but even without that it has a whole lot of steering with its current setup, amost could turn on a dime.
I will say that other than the instruction manual (liked my CEN Matrix one better), its one of my favorite vehicles. In the future I wouldn't mind the truggy version, and I look forward to the MBX6 coming out, so i can get mbx5r's cheap for parts !
