Interesting Valve Clearance Technique

Had this viddy on my feed today...looks intriguing...

Basically the TPI of the adjusters is determined, then all clearance zero'd out with cam just about to open the valve...winding out adjuster by the needed amount previously determined, ie a partial turn. Set the lock nut and done. No feelers needed and it takes into account and valve tip indentations.

On a Norton is very hard to set up dial indicators , especially on the valve adjuster, if the engine is in the frame. The Commando Rider's Manual show you the proper way to do it. The tops of adjusters are normally not true and flat. On a 650 Triumph I would use the unscrew method and by feel, like the old time Triumph mechanics showed me.