4-barrel or 3-barrel?
 

What I feel is that I my right hand (PP#1 or PP#3) supports the primary lever through impact. I do not feel I am deliberately applying muscle power, even though I the supporting force is there - somehow.

What can I do to determine whether the "force supporting the primary lever through impact" comes from clubhead lag pressure (PP3 transfer power) or from muscle power (PP1)?

There is some kind of supporting force there - and it is VERY productive.

When I apply that right hand (PP1 power or PP3 lag pressure) through impact I can gain substantial extra carry - especially for the mid irons. I get crazy distances. Sometimes also for the woods. I hit a 3W the other day that basically scared me. I could not believe the distance I got. I have played that hole at least 50 times and the 3W was as long as the best drivers I've ever hit on that hole.

Reason I am asking is that if I am indeed a 4-barrel I want to get away from it. I believe it's too hard to produce quality shots that way. Even though my shots are very good distance-wise I am not 100% happy with the precision. I do not know if the precision I lack has snuck in through the fourth barrel power or if it is something else. Precision is not the big issue for me. What is the issue is determining 3 or 4 barrels.

Let's say I am indeed a 4-barrel. This leads me to a very trivial question that I should be able to answer myself, but I lack a piece of the puzzle to do it:

I'll put it this way:
What - if anything - supports the shaft through impact for a Swinger?

The reason for the question is OBVIOUSLY that a supporting force will make a lot more power being transferred to the ball through impact.

Swinger Support
 

"What, if anything, supports the shaft through Impact for a swinger?"
I would say Extensor Action, and usually... the #3 Pressure Point.

There is some debate about 4 Barrel Swinging. I think most agree that 4 Barrel Hitting is OK.

Supporting Centrifugal Pull
 

Have you referenced 10-19-C (Drag Loading)?

"Then, further acceleration can be applied only at Presure Point #1 to support the Pull on the Clubshaft -- especially for Short Shot Power."

Re: Supporting Centrifugal Pull
 

...and ...and "For Clubhead Throwaway prevention, monitor the pull of Centrifugal Force and the Drag of the Lagging Clubhead."

I have been 3-F-7:ed. Snare detect and drumroll :) . Now steering away from STEERING. Thanks. Great pointer as always. Will check this out. Videowise.

The bigger the snare (drum), the louder the drumroll. 8)