[Suicide Junkie]

Re: Spaces per one.

If you have a spaces per one value of, say 40, and the hull size happens to be 400 (light cruiser), the AI will put 10 of those components on.

The reason why you don't specify "add exactly 10 of this item" is because the design patter will fit more than one hull size (minimum tonnage up to Maximum tonnage), and this will scale the number to match the latest tech hull.