I have setup full RTS/CTS handshaking not just pulled high, lets see how that works.

I'm sure you guys know if the 861 requires RTS/CTS for its config app communications.

I will report back if this solves it. It will take maybe days to verify it.

AND *THANKS* this forum is awesome.

861v8+ID40, HD621, 808.3, MC200, 8000, 7200HC, 4x 5200, analog sub, iPads.
The MC200 feeds a Crestron source.