I'm not bashing it at all, but 4x4 or not that's got to make the front wheels useless still in a wheelie. It just will take a little bit longer is all IMO. And then factor in now you have twice the parts to deal with when the cartwheeling begins. I just look at some of the rc's I have had right down to brushless. Throw in the biggest lipo pack and speeds of 70+ mph. It just wears of fast for me when you have insane power that's almost uncontrollable at times. I mean when you think of it I've had 80cc motocross bikes as a kid, and have driven them as a adult. And at six foot six inches tall and 200lbs(give or take here too) that will still wheelie all day with me on it. So 30-40lbs give or take on a Mt, in scale size will be like a few ounces to this engine IMO. Plus does anyone know how much this monster weight is of hand? But anyways like I said I'm not putting it down at all. Just I would not think one moment that 4x4 is the (oh my goodness is going to handle so much bette) solution. The torque and power will still have you cartwheeling all day long as well I believe.