Don't ask me to prove it but I could swear I saw a vid of Shane saying he uses that (TOI) method. I myself use it once in a great while when I am perpendicular to the rail and dead even with an OB that I want to cut down the rail. I don't know, I think it gives me a touch of squirt on the CB that makes me cut the OB a little thinner. Pool is all in your head.
Using inside when needed isn't what CJ sells - he says you should
aim to the side of the pocket and use inside to correct to center pocket on
most shots, because it "enlarges the margin of error". In fact, as we all know, hitting the CB off center makes aiming less accurate, not more - but the less knowledgeable players who try it will pay closer attention to where they hit the CB and to what part of the pocket they're aiming, so they'll see some improvement and believe CJ's nonsense claim that TOI is the reason. This means they not only learn untrue things, but things that
contradict reality. It makes them dumber.
About thin cuts with the OB frozen to the rail: it's a well known fact that using inside for these specific shots actually does increase your margin of error because you can hit a little bit rail first and still make the shot (because the spin throws the CB into the OB) - you can even make cuts that are greater than 90 degrees this way. But, again, this true fact is nothing like what CJ peddles.
As far as using side spin to create some squirt so you'll hit the shot a little thinner - that's more like what CJ teaches (except he doesn't limit it to just this kind of shot), and I disagree with it. Better to just learn to aim a little thinner without side spin and squirt. Don't use a "cure" that's worse than the "disease".
pj
chgo