First, you are a very good skier. That technique can handle adding a lot more buoys. I have a lot to say about onside turn trouble and when I have a chance I'll add it to this thread. For now, one of the smartest replies I have ever gotten about my onside woes was from Trent Finlayson. His view on this is stated below The largest point is that the tail does not drift wider than the tip. Onside turn is anything but. A LOT of skiers struggle onside. Have you ever had a ski that rocked your onside and felt automatic? :
-This Z turn problem is the result of a lack of speed at the completion of your turn. This "all-or-nothing" sensation you describe is unavoidable with diminishing speed. As your water speed decreases, so to does your base's (ski's) ability to support your edge angle and lean. (I try not to use many allusions, but liken this to applying your brakes while you are leaning into a turn on your bike.) On your ski, your only option is to shift your weight back if your speed is insufficient. You will continue to shift back until the pressure of the rope picks you up, and, at this point your turn has completed. You will either have not enough angle to ski your desired path, or you will have not enough speed to maintain the angle your ski has tipped into. Either way, you have not skied through the turn in an efficient manner.
You mentioned running a long parallel line into the buoy. This is the problem. You have not travelled outbound through your release, and therefore the tail of your ski has not drifted wider than your tip during the set-up for your turn. As you can relate to, this is a terrible feeling. You are now rapidly losing speed, and have very little chance of carving your turn. The culprit is going to be the manner in which you initiate your edge change. Your trailing side alignment is being disrupted as you begin your release. (Trailing side is left side as your cut to one-bail.) Your trailing hip and trailing elbow need to remain connected and aligned as you release off the second wake. This trailing side alignment must remain intact as you change edges and move up to the point of your reach. The most typical problem is allowing your trailing elbow to disconnect from your trailing hip as you begin your edge change (in an attempt to ready yourself for the turn too early.) This disrupts your alignment. Your upper body gets pulled to the inside, your tip prematurely engages and you begin to run parallel with the boat too soon.
This disconnect, or misalignment through the edge change is the result of too much line
pressure into the wakes. This can be caused by a few different factors.
-Inadequate speed through gate turn-in. This results in less angle and causes you to
over-lean, (most common)
-Overloading line. Leaning too hard, or dropping lead shoulder into wake.
-Fin too Deep. (Too much pressure)
-Fin too far forward. (Not enough drift through release)
_other set-up problems. Something is causing you to have not enough angle, and too much load. This is easily addressed by examining your particular set-up.
This is the big picture jump-off. Let me know your particular set-up, and we can narrow in on the root easily.
Talk soon,