[ghmerrill]

Thanks.  It's what is thought.  Just wanted to be sure I hadn't missed something.  The DUO appears to support an astonishing number of distinctions and possibilities.  Supporting those in an app would get pretty burdensome.  I don't want to get too carried away with pedal actions anyway -- basic hands-free page control is really what matters.  Anything else I can accomplish with finger touches on the screen.