So, have you bought the AT yet?I'm giving serious thought to running a machine with 2-3 people. It needs to be able to LEGIT support 2 wands, to do this, though. Anyone using a machine (something currently on the market, that can be purchased NEW) that can do this thing? The 870 doesn't QUITE have 2x the airflow of the 570, and I'll buy an AT if I HAVE to, but....eh.