#1
considering this mod but wondering... is it worth it? cons pluses? personal experience with regular single battery setup vs 18v?
#2
cons: takes up more space, eats 2 batteries instead of one.
pros: little more punch and clarity, attack transients are a little sharper and don't blur as easy. clean headroom is increased.

well worth it to me. You could also wire it in parallel to give you longer battery life than one battery could give you.
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