I'm not sure I'm game enough to set that Global setting to "Yes" and let it change all my presets - I have Buddy's 1400 of 'em sitting there, plus a whole stack of Burgs's and others, plus some of the factory ones shunted down to the high numbers. If I WERE to give it the big "Yes" and let it change all the cab specs to new resonance and impedance settings, do I then have to go through all my presets and save them one by one? And is there a risk that the change will screw up some of those presets? Or am I safer just to say "No" and only use the new FW powers on new presets?