What tooth is it? Despite the bad stigma with using steel on steel, I still want to try it. I started a
thread a while back on this and one part of Mike's response leads me to believe that if the motor is mounted VERY solidly, the combo should work. Maybe use a clamp style mount so it's closer to the chassis for less flex. I really think flex is what causes the issue. That and maybe the lack of a slipper. The only difference between Nitro and BL (torque aside) is the fact that the Nitro has the clutchbell, which is sorta like a slipper.
Maybe if you decide you don't want to use it, I could take it off your hands? No sense in letting it go to waste. :)