This is what I don't get...The PA2 already has auto-fill, just not assigned to a particular button.

You can set it up so that when you hit a fill button it automatically goes to whatever variation you choose, even to a break....It can be linked and saved within a Songbook entry, so your "fill-mode" can be different for EVERY song if you so wish.

I just don't see how having a dedicated button on the front panel is THAT much of an upgrade to be honest.

Dennis