Well here is 50 Minutes of Advanced Gimbal Training from Obeo and the Allsteady 6 made by Turbo Ace gimbal camera rig.
If you do need to know more about PIDs and fine tuning your rig, then there may be something in this lesson for you and your gimbal. Just pick the bones out of it, to suit.
This video provides advanced training on the setup of the Allsteady 6 made by Turbo Ace. With proper setup, this device becomes much easier to use. This video also assumes that you already have a basic understanding of the use and function of the gimbal.