Gonna try some on-road racing tomorrow with the XO-1. Did a little testing in my street. Hard on the gas then hard on the brakes, turn around and repeat. Did this for about 10-15 minutes. I was only using 4S and could tell they were losing power. Motor temp was ~130F. XL2 ESC temp was ~120F. Not bad. I do have a CC blower on the motor and the XL2 has a good size fan. I actually have some wear on my tires now lol. I'll let y'all know how it goes tomorrow. I'll try to get some video.