I haven't read all the posts, so someone may have already shared this tid-bit: Take a stripe ball, and make sure it is really clean. Set the ball so the stripe is horizontal with your playing surface. The bottom line of the stripe color is your aiming point. Chalk your cue really well; more than usual, so it is caked on the tip. Now cue the striped ball, aiming for the bottom color line. Then, check the stripe for the chalk mark, and see exactly where you are making contact. Also, make sure your bridge is closer to the cue ball; really close. It will feel a little weird. This will help, and you can gradually move to a natural bridge length after you're drawing consistently. I really don't think you are striking the cue ball where you think. Use a stripe.
Thanks. I've done what you describe and you are correct: I am not hitting the QB where I'm aiming. I believe consistency is one of my biggest problems. I'm workin on it though.