Yes I recall the same claim. Not quite so sure it worked just in that precise manner either but it works sufficiently well. The plastic grommets are now getting salty though and I had one crack through age not so long ago. Makes you wonder if turned brass replacements may be better longer term or even blued steel inserts?
Yes I was reading one of those review centre things recently and the old 45 was rated 4.9/5.0 so not too shabby.
But it does come down to fashion trends and Diana don't seem to capture the interest that some makes do. Even when some Diana models clearly have numerous advantages over some others makes.