I was at the two Charlottesville shows and noticed an HD500 box sitting on a case off stage left. Looked around the stage but didn't see one on Friday. I knew that their archivest Steve Lawlor uses an M13, which he had on stage both nights when he guested, so the HD500 wasn't his.
On saturday night I was sitting on the stage right side but could make out the HD500 in front of the horn section, so it was either in use by Joeff Coffin (sax) or Rashawn Ross (trumpet). I'll have to listen through the tapes to see if I hear any evidence of it on the horn sounds. I'm interested to see how it's utilized for the horns...whether it would be run direct from the mic or whether they loop another patch through from FOH for the HD500 signal (probably the latter).
I'm trying to find a clear enough pic, but it looks like it's in front of the trumpet player.