A couple of thoughts...
I see where Lou is coming from....there have been a more than a few posts where the SPF system/BCA/whatever sorta comes across as this cult....a lot of people sort of dogpile and it reads as being the absolute only way to play pool....it was a little scary and steered me away in a big way....granted, that was just my perception, not saying that is the way it is
Then my game just seemed to fall apart (lack of confidence among other things) that essentially snowballed into an inability to run more than two balls at a time....well, I started talking to Randy, and with him being local, I invested in a class with him.....in the 8 hours, I was taught working vocabulary, basics, parts of the stroke, eye stuff....in 25 years of pool, I was doing some version of all of this stuff, but now I knew what I was doing, and more importantly, knew how to address issues and what to look for when I felt "out of stroke"......although I have not adopted every part of what he taught, I do have the ability to diagnos stroke problems on my own and I found out what part of the teachings do work for me....
Like golf, baseball, or any other contact sport, the vast majority of top players are similar if not exact during contact....how you get there can be completely different from player to player....
Randy, hope you are doing well and the knee is better.....would like to meet you out at Sherrill Park sometime soon for a round when you get time....hope all is well....