Here's a photo of my pedal set-up:



As I mentioned, the looper then gets plugged directly into my Bose L1. I use the FS3X to scroll through my songs (80+-). Each tune has a number on my set list that corresponds to each track on the looper. As a guitar player, I'm able to move from song to song "hands free". I can even scroll ahead to another song that will start immediately after the one I'm playing.

It works for me. As this threads seems to indicate there really are a lot of good ways to create your "invisible" band.