When I noticed book procedure, I took theory into practice and experimented on the way of approaching the plunger release of the cam chain tensioner. I rammed the plunger in and did not notice the preset. All I knew was the damn thing held the plunger in. So with the set ring in the groove this time, I could see it didn't take but one tap to release the plunger.
Since the book step shows using a long screwdriver to push the slipper against the plunger's nose, why not snap the chain against the slipper so the nose takes the same kind of push at it like the long screwdriver. And since the slipper needs to drop in the opposite direction of the snap, that slight air gap at the cct body and head is not about to stress parts with the crank needing to spin a few times to set the cct and make sure the chain didn't slip by not catching that one too.