I run both Lionel and Mth at the same time with out adding the inductor chokes to the Lionel engines. My track length sounds similar to yours and have 4 track feeders in a star pattern, where the middle rail is isolated between the blocks. My track signal is definitely reduced when running Lionel engines, but the mth engines work assuming the engine is already in the remote. If I am adding an mth engine to the remote for the first time, I usually half to remove the Lionel engines or it won’t find it.
I would not recommend using the microphone through the dcs remote though as it seems to get stuck on when the dcs signal is weaker.
