On February 11, 2017 at 13:44, kgossen said...
Pretty sure you're right, the remote was an RF10, 20 or 30. If you look at the manual and specs I can't find anywhere to change the ID of the 100.
It originally came with mx-600, it later got a name "the Expander" for use with urc-100, 200, and 300 remotes. By time RF10 , 20, and 30 came out it was wearing model mrf100A. All three incarnations are set ID0.