I haven't head anything about the Atlas Locomatic system for years... It was a command system only for atlas engines and everything else on the layout had to have a choke installed to block off interference so the system could work,( Or was it the other way around,) Anyway it never really too off but it did lead to the choke blocking TMCC interference to the dcs signal. I was part of that years ago.
Back to the question.... Why not try Atlas? do they still have a forum or someone you could contact.
Jim Weaver was a great guy to talk to and went out of his way to help.
Are you still using the system Bob?