A very generous fellow named Darrell Lamm gave me this locomotive. For free. Just so I could test my receivers in it! It is a very nice model, all metal, with an already installed Lok Sound DCC decoder. Amazing. The only problem is that it is one size smaller than the scale I run, I have no place to run it. Anyhow, despite being O scale instead of G, this locomotive has plenty of room for my stock Protothrottle Receiver. Battery, Receiver, DCC Amp and a 5v power supply. Since I don’t really have any O scale track (one three foot section is all I own), I will probably sell this at some point, not sure.