I am thinking about it. I am not sure right now about getting power to wheels with 3 wide trucks, but an outside truck frame could work for a diesel. I was originally thinking about how hard it would be to use track power but for lego battery power is a viable option. A steam engine may need to be tender driven.
Like I said though, I want to experiment with other rolling stock build ideas. I have made much of my living at coal fired power plants so I really like working with hopper cars. There are some internal features of this build I want to tweak if I build a second copy.
