Mod a badlander to have an overall master volume?

[spawnofthesith2]

I’m sure this seems like a dumb proposal, but I’m curious, how feasible/possible would a mod like this be? I’m sure this sounds dumb to 99% of people, but I have a hyper specific use case that having an overall master would be a complete game changer. I love this amp, but the location of the channel masters in the circuit cause some rather significant issues with live performance for my situation….

 

[rarebitusa]

I run a vol pedal in the loop, would that work for you?