[Wbulk]

That's an interesting video. I have never seen that whistle tool. The adjustment part I have not seen used before. They are finding top dead center on the compression stroke and the adjusting both valves at the same time. The spinning of the push rod and lifting part is right on. The only thing I would add is while you are doing that and tightening the rocker stud be sure not to push down on the rocker with the wrench. Pushing down can make you think you have the play out of it when you don't. The other method is the exhaust opening, intake closing method which I think it's easier. You just watch the valves and don't have to do that extra turning. You can find the detailed instructions on comp cams website.

Wayne