pmata814...The answer is no, because the OP is arbitrarily placing balls. It's true that straight ins (especially those with great distance between the CB & OB) really test your stroke. However, in order to accurately test yourself, you have to set up exact shots, especially when dealing with straight line shots. I use a laser, and hole reinforcements, to create test lines that highlight the degree of error, and how to correct it, on any shot. Shooting the CB up and back to the tip is a great drill. If you're afraid that you have table roll (and you can't fix it), just shoot the shot at a high enough speed to take out the table roll. Use a stipe ball with the stripe perfectly upright. That will show you whether you can aim and strike the CB above center, on the vertical axis. Either it comes back to your tip, or it doesn't. You have to have visual targets, like spots, diamonds, and a chalk. That drill also highlights your sight line (where your cue lines up under your face, when you perceive a straight line). To see it, though, you have to video yourself headon, and be able to zoom in on your face and cuestick. Most people have no idea where their cue is lined up...all they know is that it usually "looks right".
Garrett...In your instructions you mention photos of the drills, but I didn't see any photos in either link. Did I miss them?
Scott Lee
www.poolknowledge.com