an atlas O early non cruise rs1 with a newer rs1 with cruise.
The eary one did not come with a smoke unit capacitor to make them compatable with the latter and if you try to run the two together you will ruin the radio board and smoke unit on the early one.
Yes I had the cruise control off and had them both in a lashup. After about 2 minutes of running the early loco stopping smoking and started to make funny sounds It is now in to atlas for repair.
THE GOOD Thing is atlas is very good at covering the older loco under an expired warranty as it should have had the cap to strart with.
Talk to Pete he is a very nice guy.
This is reported not be belittle a product but to inform those of you who do not know this can happen .
Dave Roxin.