I want to add an unsolicited endorsement for the BreakRAK II. I recently purchased one of these from Charlie Bond and it works exactly as advertised. It is not only great for repetitive break practice, but it also takes all of the other variables out of the equation, such as balls pocketed and interfering balls altering the cue balls path.
With the BreakRAK II, you can quickly develop pinpoint cue ball placement at varying break speeds--no gathering ball, no racking. The BreakRAK is not designed to help ball pocketing on the break, but if you want to perfect your cue ball position on break shots, this is the tool to use. For instructors, this is an especially valuable tool--it lets you spend your time with the student, not at the foot of the table.
Furthermore, I cannot speak highly enough of the customer service afforded by Mr. Bond. When I called to purchase, I needed the product in a hurry to work with a student who was traveling a long distance. Charlie did not have a BreakRAK in stock, but he went "above and beyond" to assemble one and ship it overnight.
I am impressed with both the product and the service, and recommend the BreakRAK II to anyone who is interested in improving their break.
1-P