FWIW, I have a small, battery-powered backup pedalboard based around a Tech 21 RK5 that is my current backup solution. Not as good a tone as the AX8 tone, and a very limited tonal palette, but it is small, easy to carry and connect in a hurry, and works well enough with FOH, FRFR speakers, and guitar amps to get me through a gig, so I'm covered. I already have an Amplifire, but have had some issues with it and for that reason prefer not to use it as a backup. Matter of fact, the RK5 board saved my bacon when the Amplifire board went down at a gig. But I'm toying with the idea of a spare AX8, maybe when I get the bread together for it and I'm not gassing for something else. Going to play the AX8 I currently own for a while first and see what, if any, issues crop up before I decide.