I recently bought a B6.4 that that basically came rtr with an MX10 Pro. The esc works great when it finally decides to connect I guess. When I turn it on it appears as though the light is red/blue. I have to turn it on and off a couple times and wait a few minutes for the light to turn blue and start blinking. And eventually it will power the motor. I can't find a manual online and have not yet got the programmer box. I'm not sure if it is a programming issue or not.