I also was rather disappointed with the 200th issue. It seemed somewhat lack-lustre.
I can't help thinking there was a section missing from the Sheet Metal Forming article. It mentions a "main roller" in the text, and specifies to note that the ends are of reduced diameter, but there is no drawing for it. A "main roller" is not shown anywhere.
Not knowing how the complete device is supposed to work, I confess that I don't see how the parts in the drawings are related. A total GA with part names or numbers would be a useful addition. As it stands, I don't understand it sufficiently well to start making one, even though it seems like a useful tool.
In the "Special Interest Books" section of "On the Editor's Bench" is the sentence that starts with "You can find an advert…". It doesn't exist in my copy.