The locations of the windows are marked with a fine felt pen then drilled (there are hundreds ones...)

In some places of the trenches, larger holes are made, because these areas will be more lighted by diffusion through a clear rod. On the original model, some bulb lights can be clealy seen.

Some holes for optical fibers are drilles fruitlessly, as they finish in aluminum U-strip (which cost me a few bits by the way...). They are then filled back with plastic filler.

The slots of the lateral electrical connectors are prepared. They will be used when the model will be hang from the side.