You can also practice doing figure-eights, horizontal ∞, vertical 8, and other angles very slowly. This will give you a very good idea of the input needed from the "stationary" hand, and the "switchover" when doing ladders. Remember to practice in both directions so you don't become "handed" (only able to do one direction). Doing it as a figure-eight makes the down pivots easier to learn. Again, make the figure-eights tighter and tighter and you will end up doing tip pivots. Do this exercise slowly in as good a wind as possible. Fighting the wind will not create muscle memory; you need to do as many relatively good repetitions as possible to improve the move.
Here's an exercise to try..
Don't think of it as a pivot or static spot but instead a very tight turn.. Visualize a circle the size of a Garbage Can Lid and make the "pivot" follow that arc. The pivot controller isn't true static, as that end of the kite is still flying and requires input in the form of small adjustments. Visualize your pivot turns as SMALL circle turns and practice with that Garbage Can ARC in your mind.. Then decrease the Garbage Can Lid Size Arc to a basketball arc and progress to a Softball and then even a Quarter. You'll find you maintain much more control throughout your maneuver if you concentrate on the small circles and let the big ones draw themselves..