yea, do it like a normal roll, but try pushing up before you release it, then release when you normally would, but when it gets to the part where it would roll across the back of your hand, move your up with it, but not as far so that you have a small space between the back of your hand and the stick. since its not rolling across, it doesnt move in space, then when it comes around, catch it again, and your hand should be in the same spot it was in when you released it, try doing this repeatedly for periods of time to help you get it down. do it for like five minutes without stopping the roll. then try it on your other hand. by the way, ive noticed that i can only do it in one direction, for me with my right hand i have to twirl it counter clockwise, so it comes across from the far end and over to my thumb. and the opposite with my other hand. i can almost do it from my thumb to my pinky side, but it makes it difficult to catch again.