Using the channel changer to force the TV to a known input state works perfectly. Also, the "Band" function on the HTIB forces it to a known state, allowing me to rotate through Video1, Video2, DVD, etc. as needed depending on my source selection for the macro.

I'm fighting some gremlins - macros that work perfectly seem to fail after I create or edit other macros. I don't know yet if this is due to some changes occuring in the remote, or coincidental randomness in the ability of the remote to control 3-4 different devices with timings, IR noise, etc.

But the original problem is solved and I'm on my way. Thanks again, Ron.