@Bruce_Butterfield is spot on. while everyone else has focused on the handle separation in the preturn, bruce has addressed the root cause of this handle separation. i would even take it one step further and say that the problem starts at the finish of the 1,3,5 turns....when you are finishing your 1,3,5 turn, your hips begin to drop back, the only way to keep them over your knees and feet is to transfer your mass forward with more front foot pressure at the backside of the buoy. if you wait to try to move your hips forward behind the boat it will be too late. by staying ahead of the ski out of the turn with your mass you will get more of the ski in the water, create more acceleration and angle thereby giving you a better path into 2,4 which will eliminate your slack. i would keep videoing your sets and watch Rossi's and try to copy his body position out of 1,3,5. you can even see with Rossi, as the line gets shorter, he does a better job of staying on top of the ski out of 1,3,5