I do not have a layout so I cannot do this but has anyone been able to double head a TMCC locomotive with either another TMCC locomotive from a different manufacturer or a locomotive with an ERR upgrade? If I had a layout, I'd have tried this already. It wou d be really nice to see a Lionel Legacy double heading with a 3rd Rail with an ERR upgrade. I think it would be fun to double head a TMCC or Legacy locomotive with a DCS locomotive but I've never seen it done before. I would think that with DCS' access to TMCC and Legacy, that that system could actually make up a double header. If not, I'd have a TMCC in one hand and a DCS in the other - LOL!!! Come to think about it, I don't really see a lot of double heading at all. I watch a lot of youtube since there is so much good stuff there. Anyways, just a subject for conversation.