I've been under the impression that the Device Code "search" provided by the Cinema 7 doesn't try every possible Device Code, just all of the Device Codes in it's ROMs.

If a new device comes out that uses a 1xxx or even 2xxx Device Code, and a default layout is not in the remote's ROMs, then you will not find it on a search. You would have to find it out from a third party and map all of the keys yourself.

Non