I just use what tools it comes with, nothing special.
Just adjust your ducer's cord length and use the Vexilar stopper to shorten or lengthen cord so it hangs just below Ice. You will have to adjust depending on ice thickness throughout the season.
Then, only let out enough cord to have the ducer stay on 1 side of the hole. So I will usually set my vex on the right side of my hole, I will have the ducer and cord come out, but only enough cord to have the ducer hang freely straight down, but no more. Then with the excess cord, i just set my vex on top so no more cord comes out so it doesn't float around my hole.
Basically like a dog leash. IF you don't want him swimming around the hole, don't give him enough leash to do that. Just enough leash to get what you want done.
I'm sure someone has a neat little invention they made.