Looks like your "customer" also has some very impressive 2-D CAD skills! That certainly makes collaboration (commercial or otherwise) much easier and we'll be seeing more and more of that. We'll also be seeing many more Isometric construction drawings instead of photos in product manuals. Flair did away entirely with text descriptions of construction on their Puppeteer Mark II in favor of isometrics.

While I have a deep love of hand-drawn plans as objects of beauty (and find CAD drawings rather ugly), designing in CAD greatly enhances (if the user is strict with himself) the likelihood of a truly scale design. However, as I've said at other times in other places, I think there's a danger that using CAD can push designers to design in certain ways that may not be compatible with the "spirit" of the original, an example of this is the "3-D puzzle" approach.

Also I suspect that the days of having to work with two different CAD softwares are numbered. I don't know what 2-CAD was used here, but soon (or already in some cases) all you'll have to do is click "Render 3D."