" But I am certainly no expert... ""
Certainly you are not but neither those gentlemans that posted is ok with unipivots, no matters what .
I never claimed to be an expert, just an end user, I left the expertise to Bob Graham (an actual engineer) ;-)
The matters is know-how and common sense not if we like it. Btw, the Graham was a copy-cat of Audiocraft unipivot AC3000: @tobes do you know Audiocraft changed it by the 3300?
There are certainly similarities, but also important design differences. So what?
The point of my statement above was simply that not all unipivot designs feel unstable - they certainly don't "jump all over the place" - nor are they all difficult to use (even with no experience). Setup and use of the Graham arms was a 'piece of cake'.
Analog playback is imperfect by nature, different designs make their choices in dealing with the imperfections. In practice there is 'more than one way to skin a cat' ;-)
Peace and back to the subject under discussion.