As I'm no stranger to ridicule, here's as far as I got. It demos by clicking the Apple menu item and beeping while you mash the "Knob Tweaker" hotkey -- 1 second without a hotkey press and the pointer should return to its original position.
Two macros changing the same Global variable -- ewwwww! 
Knob Tweaking Macros.kmmacros (7.4 KB)
