Mike, there are a lot of schools of thought on how to break in an engine. There's "ride-it-like-you-stole-it" style, There's the breaking in of a rebuilt engine that takes just around a few minutes, There's the no-breaking-in anymore because the machine has undergone a series of breaking-in in the factory already. This is concerning the engine, per se, but for rollers and belts, I don't know if there's a rule on breaking-in.