Another KO guy here. I use an EX-1ur. I liked the Eurus, but it was just too large feeling for me. The EX-1 feels small and compact, which I like. I just wish it had the angle option for the wheel dropdown. Meh, anyway, it's damn fast and hasn't given me any issues at the track or when just tooling around the neighborhood. I put an Orca LiPo in it which seems to last forever between charges. I use a SpeedMind bag for mine as well.