It's just a great work! I am building this model myself, and I looked at a lot of such machines on the Internet. Your work is really one of the best. Unfortunately, my build showed a defect in this set (and not only for me alone). The fact is that over time, from the loopholes on the windows appear radial cracks. Also I see, you made the wiring on the bottom. Did you use any reference materials? If so, could you help me with this?