Does anyone know if you can add an external footswitch (I'm using a Digitech FS3X) to control effects? For example, I have a looper in my bank, but I rarely use it live. What I wanted to do was have the looper assigned to my FS3X and have it not show on the HX until I press one of the buttons on the FS3X. That way, it doesn't take up 1 of the 6 screens, but when I press the FS3X, it would activate the looper and then give me access to the looper functionality and screens. Basically, I just want an external footswitch to be able to turn the looper screen on and off. Any help?