Okay, so I got my US 2.5 and I have some issues/questions.
It came direct from the manufacturer and without the "jumper wire" mentioned (and that I've seen elsewhere) but it still worked just fine for a while. Now, I only get about five minutes max of runtime before it does one of three things: the sound quits with just an electrical hum but the LED stays on, and the board stops accepting input from either the motion, clash or button (I have to break the circuit with the kill key in a 4.8 NiMH setup to turn it off), or it will reset itself, or it will go lights out and continue to play the idle hum, and then just say "Three. One." and hum some more with no more input.
FWIW, I'm driving a red LED and an AV switch accent on the L2 pad.
What's going on with my board?