Ok I don't know where to ask this question, but I will start here. After seeing in person the new Athearn Challenger, the sound system has me wondering? Does Athrean make the electronics for this loco themself? If not who? Would like to know if this kind of system could be retrofitted into some older steam power. Like a Koto Mikado. I like the remote control idea, and from what I have heard, the remote has more than one channel. (you can run two locos at the same time with two differant controls). I did not think the sound system would be that good, but it is ! Now, I want sound in some of my steam power.