My opinion is; don't worry so much about your stroke. If you practice, practice, practice, play, and then practice some more, your stroke will take care of itself.
If you practice, practice, practice, play, and then practice, if you have flaws in your stroke, you have succeeded in practicing the flaws. Probably not a good thing.
Develop and practice your stroke, and it will be there when you need it. But you must work to make sure you are practicing all the right things.
I spend time every week doing nothing but testing my stroke. I do this so it won't break down on me in competition.
Steve