If you have just one unit that works. I'm lucky, I have two Axe-Fx IIIs and an A/B switch on the ground, so I can really hear any firmware differences for the same amp settings on each unit. I have yet to find a Marshall style amp where I've soft reset the block that doesn't sound better in Cygnus than in firmware 15. And then add an amp boost? #fagetabouditIf you do this, and have an available amp channel, copy your original to another amp channel, and then reset one of them. Then you can go back and forth between the original and the reset one and compare the settings (and tone).