Valve train geometry

comp says
What is correct valve train geometry? When the rocker arm roller tip rolls from the intake side of the valve tip, across the center of the tip (at approximately mid-lift), to the exhaust side of the valve tip (at full lift) and back. See Diagram A.
now how is that helpful?

On geometry say with a short pushrod moving the ball from angle down to tangent at full lift or a long pushrod moving from tangent to rocker tilted way down at full lift does change the geometry. There are camgrinders that recommend tangent at 1/3 lift (less ratio near full lift- sometimes used as a crutch for valve float) to others 2/3 lift (gives more lift but higher ratio when springs are more compressed)
But I can see it the way U do what a great product
WE used to move/ shim the stands on early Big blocks with the replaceable stands

what dictates the location of the pattern is the rockers fulcrum length---or the location of the shaft/ stud- relocate studs all the time

. "If someone was to play with the pushrod length and reduce the ratio, it would narrow the pattern, but they wouldn't be correcting the geometry. They would just be introducing more inefficiency into the valvetrain". ?? Anytime you make the pushrod too short or too long you reduce the ration and widen the pattern at the same time- correct?

Holy Compound Batman- LMFAO
yet they are still inefficient. The balls /cups are in the wrong spots
DO you go to larger adjusters (thread) and larger cups/ balls?
Those pictures show why your spacers are an essential start
cheers
learn something new every day