I tried that and didn't feel like I was getting much out of it, so no. Just straight strokes through a narrow gap to make sure it's straight.
Yeah, you don't want to shoot at balls with this exercise.
MCB, thanks for the thread.
What I have done is to place a piece of tape where the cue ball would be and then place an OB in the corner pocket. This gives me something to aim at and at the same time train my eyes for proper movement from the imaginary QB to the OB.
By the way, I have whats called a kinetic tremor in my shooting arm and this exercise is working very well to reduce the shaking.
Even though I have only been doing this exercise for only a few days, it does have value and I will include it in all future practice sessions, which are everyday.
Thanks again and more to come as the three week testing period passes.
Man, I hope Earl doesn't read this thread.

John