My guess for them not touting brushless is ready is two fold. Again this only my guess. First there's way too many key features that taking priority to push in their marketing blitz. Second, if the servos are speed sensitive then you stand the chance of engaging the diffs on the fly. Brushless will take no prisoners and most likely cause damage. The stock 770 I'm guessing is more forgiving. FIne with me. My dual 550's on the E-revo pose a challenge for me to handle in anything but a straight line.