FYI that video is only tank #2... technically that engine never ever had a breakin.... I idled tank #1, then threw it on the ground and started shooting video..... The engine was hand lapped, but it still went thru a breakin period and dropped its nuts at about 1/2 gallon.... I would say that video is showing about 90% of bottom end and about 80% of top end.... Once fully broken in and dialed the engine's performance increased noticeably....