How to
All the vector models on this site are made with a two-layer technique. Handled correctly, it lets you move a scale model around without cutting any lines behind it.
This is how it works:
One layer is a joined curve of all the outermost lines in the model. Fill this shape with a solid colour and keep an outline thickness. The other layer holds all the details of the model and sits on top of the first.
The combined layers make the finished scale model. Both layers have to be above the layers of your drawing.
Pro tip: give the outline layer a higher line weight than the inner detail lines. All models on this site are drawn that way.
Since the models are 2D, this is how you actually experience them. Group the model and move it around without cutting lines from the drawing behind it.