I'm using an IR-543 right now. It's one of the pre-programmed options in the AUX category, and it works fine manually - that is, I can issue a "2" followed by a "channel down." to turn off a command.

The one issue I have is that macro commands are started and stopped by "channel Up" commands, so I need to figure out how to include channel up in a macro.

Other than that, it works fine out of the box.

Ron