Hi Bob - how are the SNT's working out for you?
I would agree that the lock up issue seemed to be related to "overloading" the receiver with commands - I think a combination of being in a hurry and/or fat-fingering the 1070 remote caused my lock up issue.
I've been experimenting with Auto-Polling and found that turning it back ON for my Comcast box source (vid 2) has cut wayyyy down on my no-audio bugs.
Always an adventure