Carl, did you notice any tonal change when you swapped to the Phase II keys? I'm assuming you kept the same set of strings. BTW, you helped inspire me to put a set of the new knobs on my HBII. I had a pair sitting around from an abandoned project and (foolishly, I now see) I was hesitant to mix the new style with my old guitar. Made the change last night and it of course looks fantastic and feels great.