Hi, is that the break-in procedure the manufacturer of the new top end kit recommends? I've never been a fan of breaking it in like you just described for the initial run. Start it up, make sure there are no immediate leaks to be found through any of the gaskets and take that out for a ride, varying the engine speed on accel and let the engine brake under deceleration. The rings should be put under the load of acceleration and deceleration. Blipping the throttle or varying the RPM on the bench or idling puts little, if any, load on the engine in the context of actually breaking it in.