Welcome ... In fact, it is very difficult to do loops, but not impossible. What came to me to do it is generally acceptable to the 4-beat loop and tempo up. Of course, to use the jog dial to the right sometimes. And live only use the loop divider, if it goes well, all divide = hot loop . The 2, 4, 8 beat loops are good, do not realize the drift 1/2, 1/4, 1/8, 1/16 at = you can use, but the 1 beat you do not use, it very difficult keep in sync. The correct bpm is important to be able to accurately divide the CDJ, 1 frame = 13.3333 ms. Good luck