I agree the safety of a sprag is worth it. My second outing in a 250 a few years ago, I stuck the engine at Mid Ohio on the front straight. It happen so quick I had no time to grab the clutch and proceeded to put it in the wall. I was ok but the kart was hurt bad, and it really rattled my cage. The next season I had a sprag on it. Took away that fear of going for a ride. Took a while to get used to it, but I agree the kart feels more free in the corners. Will not get in a kart on a big track without one now.