I haven’t gone through a lot of pages, so sorry if this was mentioned. But why the trigger? The drill motions in the video looks like it forces almost more sliding-like motions. I don’t know, just seems like its adding another piece to time just right at impact.
I saw first hand the difference my father and a couple of the older guys at my course saw when they got fitted and went to lighter graphite shafts and more forgiving heads. They picked up yardage and they hit it more solidly. And these are good players, guys that have been single digit handicaps for 40 years.
As Erik said year to year you might not see much difference, but if you compare the technology now to technology say 10-15 years ago it's night and day. This is especially true if you are aging and you swing speed isn't what it once was.
Okay, I think I did day 4, but for my A6 I don't know if I did it right. I think I need more time to mentally process this. And then I notice that, if I'm looking at these correctly, I have pretty much the opposite A6 as @NM Golf which I'm not sure if I should be worried.
I know the camera angle isn't ideal, and neither is the box the camera is sitting on. I'm going to dig up my tripod tomorrow. By the end of this I might even take competent video indoors.