not a bad idea there with the rollers. i have also seen car engine break in stand/things. i dont remember exacltly, but i think it had throttle control, and some kind of gear box system to put a load on it, or at least thats what it looked like to me as i quickly glanced at it. i wouldnt buy it though, cuz i remember walking around all day thinking, "why would anyone pay that much for a test stand/thinger when you can break it in in you car?!".