Yes, You are not quite understanding how it works.
You assign the SIS in FM3 to "look up" a location, it will always execute that function, no matter what layout you are in.
Nope. I keep a tune/tap tempo switch on layout 9 and I just set my external switch to be a stand-in for that switch. Bonus: if I forget my outboard switch box, I can still get to my tune/tap tempo switch on layout 9.Let me ask one last thing. Is there any way to assign a tuner to a external switch without assigning the external switch as a stand in switch?
Nope. I keep a tune/tap tempo switch on layout 9 and I just set my external switch to be a stand-in for that switch. Bonus: if I forget my outboard switch box, I can still get to my tune/tap tempo switch on layout 9.