Interesting but silly title both as noted in the opening paragraph and as the 'd' in 'CAD' means design already (computer aided design design)
I wasn't thinking of it in that way, when I wrote the title, I was thinking of the second "design" as "the thing", and the "CAD" part of it as the name of the technology area. The more I think about it, the more I think it is a little awkwardly titled.