uh, this looks like a computer case more than anything.
I don't think going bigger is going to help you, as you seem to suffer from fundamental lack of knowledge on shading and such. It'll only become glaringly more apparent in the bigger model. But go right ahead if you want.
Shading. Yes, I have the image in my head on what it's going to look like, that isn't the problem. Before I couldn't imagine it. Now I fully understand what I'm going to create. Here I drew up some quick lines on one of the larger panels to show an example of what it's going to look like:

Ignore the bad form of line shading, but it's to show what the majority of the peice is going to look like, now of course I still have yet to add the blue dome plates, though this will give you some insight. The lines that you see generally act as circuit lines as they are made of various metal alloy which are commonly embedded into the wall with a sheet of light material of mineral guard to prevent corrosion or breaks in the circuit lines. The style became popular not only for the external fashion, but because it cut down general construction time in the division of Relect wire plotting.
Though anyway aside from the facts, I plan to add the dome plates next as well as add the other circuit lines, and then start shading. I'm going to start on the side black panel later after the general is completed because I still have yet to really decide what to make it, how to make it, and with what impression to make it for. Yet after everything is finished I'll show the more high-tech/accurate model for this building, as it will be the actual building design that will be used in-game once I feel that I"ve grasped this style.