for me the 27th work great, gives me an extra paycheck after the holidays for the trip, I think it would be a good day. it's not that the 20th is a bad one but it does give everyone one more week away from christmas is all. Plus that gives Rich an extra week to make sure he has whatever parts he needs for whatever work we do.
Just a thought, like I said though if anyone has a conflict now is the time to speak up or forever hold your piece.