Success, at least for now. I purchased the Sony remote today and was able to setup for the X1, LM and Sony functions I wanted. Power on and off is not perfect but will work for now. Thanks again to 3FG. Happy Holidays to all.
Comcast Xfinity X1, XR2 remote, Martin Logan sound bar with OEM remote, Sony KDL 46hx800 tv, OEM remote