lol, by hand would have been sufficient enough. thought you might get lucky with top end. If i sold a bad motor i'd be expecting a floggin comin my way. We live and we learn i guess. if you still have the head off the car, try to spin the valves with your thumb. they shouldnt be able to move. or pull the cams off and inspect lifter adjusters more closely. If you live in sydney you can drop the head off at nepean engines in penrith and they can check it over and do some machining while it's apart.