Make your own practice delivery device. Instead of buying my delivery device and having to pay shipping. I wish to tell people and show them how to possibly improve the release of the stone if you are struggling with your release. This is cut from the tubes that are used to seperate your golf clubs and costs about $1.50. (this is a lighter weight plastic). It is approximatly 5 inches long. You put it on the handle of the stone and deliver it the same way by holding the handle of the rock at either 10 or 2 oclock. As you start to put the handle on you need to slide it off the back of the handle cleanly when you are releasing it . So it wants to slide off the back of the handle cleanly. It will show you if you are turning the rock in or out if you are not able to slide it off the back of the handle cleanly and smoothly. It is like having a light come on to what you might be doing wrong in the release of the stone. It also shows that you need to have your hand off the handle before it gets to 12 oclock. Good Luck.