This gem from another thread "What seperates the men from the boys" by Adam Cord really hit home as well:
Holding that cross course angle any longer than that is detrimental to short line skiing. In the 1st quote from Mapple above, "start your turn at the 1st wake", we're talking about the start of a process that doesn't end until after the next buoy. It's subtle, hard to see when watching skiers, and easily missed. But this is truly where the ski needs to start coming out of angle. Some skiers are able to start even earlier (Smith and Caldwell come to mind). This is what Caldwell is talking about when he talks about standing up out of angle into the wakes. Different terminology, same concept.
Now about the second quote, "your strongest pull should be at the 2nd wake". This one really stumped me for a long time, but after asking a lot of questions, watching a lot of skiers, and experimenting on my own skiing, it became clear that this is in reference to pull on the ROPE, and not pressure on the ski. The second wake is where you have A) just crossed centerline, B ) started to move the ski out of angle, C) are at or near your max speed, D) the Zero Off is gassing you the most, and E) the point where your body's inertia is changing direction the most from cross course to down course.
All of that culminates in massive rope loads at the 2nd wake, even if the ski is no longer rolled and loaded to the max, or even if there is no load on the ski. That rope load is not load for the sake of load. F=MA. That load is centripetal force that's SWINGING you up and around the pylon. If your max load was too soon, you most likely have already lost your connection and have missed the swing. You need to be swinging high on the boat to run shortline.
How does this relate to this thread? This is all about getting the rotation of the ski to start much earlier than most people think (stivot...?). When done well the preturn is truly a pre-TURN, where the ski is rotated and pointing across the course before you reach the buoy.
Finally starting to get it. Hope this helps you all as well.