Well, beat up on the ultra pretty good. lake was glare ice for the radar runs, so we never ran head to head, but he ran a best of 76 mph in 660', and my best run was 82, so no more smack talk from him. Had to leave early but the ice was getting softer every run I made, so the traction was coming to me, really were only running 550' b/c you couldn't get on the throttle without spinning the track until about 100' out. Pretty happy with the sled considering having very little traction, even was running a little faster than a couple Nytro's that were there.