The DF11's started the Chinese model railway movement way back in 1999. They were not particularly quick sellers in Western model markets at first, however many versions have since been produced. DF11 0018 was a limited edition of 5000 and DF11 0001 was released as a "special release", what ever that means (I think the amount of models made was exactly the same!)
These were very nice models at the time, featuring metal handrails, see-through roof anchor points and very crisp color schemes. The bogie side frames are push fit style and details look a little on the shallow side. DF11 0018 was in dark blue/cream livery and DF11 0001 in the prototype colors of red/cream (same style). Lettering is very crisp and the paint work is very nicely applied. Staff exchangers (those little bits in the seperate plastic baggy) are to be installed (optionally) by the owner. Also to be installed are the couplers - a rather odd oversight, as the models won't fit back in their boxes after these have been installed!
These engines are extremely heavy - which is a good thing for pulling heavy trains. Electrical pickup is perfect, and they are very quiet, responsive and smooth. There are two very large brass flywheels to help with this. They have low wheel flanges - something most of us deeply miss.
All versions will accept (#5/58/158) Kadee couplers.
Electricity is moved around the engine via a PC board and wires. The lighting is directional, with the main headlight powered by a 12 volt incandescent bulb which looks very bright and has a good color. Unfortunately, these can get very hot after a period of time which is no good for the plastic body shells in the long run. They do have some heat insulation around the bulbs, but I'm not sure I would trust this (don't forget to turn them off when not in use!). The marker lights are nice, particularly the inner red ones.
The PC board has an 8-pin plug for decoder fitting and there is ample room inside the shell for most standard HO scale decoders (DXDC also offer a sound decoder replacement board, item #5301). DO NOT attempt to run these on any DCC layout without first removing the large capacitor inside. For some reason BC used a one-way type capacitor. After running for more than a few seconds, it will explode with a sonic boom loud enough to wake Chairman Mao, followed by a cloud of burnt mushroom smelling foulness that will fill your house/shed for hours. See image below...