I just gave a three hour lesson to a couple of guys on the "finer points" of the TOI Technique. I've noticed it's common to follow through too much and move the shoulder. This seems to be "common advice" (on the street) that you must follow through, while the contrary is more accurate.
After getting the gentleman aligned properly, and his body in the appropriate position, I gave him a ten pound sword and had him use it like a pool cue. I saw the light go on, however, still dimly, so I showed him how the wrist and hand produces all the power you need with very little effort......the light became brighter.....then I showed how to beat the ghost playing 10 Ball with a Jump Cue.
He grabbed his cue and started hitting the balls in, however, in a much "different way" than before. He looked at me and smiled after making five in a row and said
"with the touch of inside it's {the Stroke} like shooting a stop shot every time no matter what the angle is".....
.yes, indeed, what could be easier? TOI is the same shot over and over allowing the Game to play. The common issue with amateur players (that I see) is they make the Game MUCH too difficult because of things they have been told or "thought" they saw.
Improving dramatically is always about doing "less," not "more". 'The Inside Game is the Teacher' www.cjwiley.com