I like the ERR system. I can install the AC/DC Commander and then come back at a later time and add the sound. I still have 7 more powered engines and 10 sound systems to add ERR too. I plan to up date my engines over the next few years. I have 3 or 4 dummy engines will sound that I run with my ERR TMCC engines w/o sound. Also I'm mostly Diesel.
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