This is a response to Raul's contention that there is a "problem" with unipivot tonearms. I am studiously trying to avoid the exchange about VPI and overhang. I had read all of Raul's posts, watched the You Tube video (actually I saw it several months ago) and so on, but did not find it particularly enlightening or persuasive. It falls far short of proof in any scientific sense that a problem exists with unipivot tonearms. Yes they wobble a bit at first drop, but stabilize very quickly. I have measured the tracking performance of several setups over a number of years using test records such as those from Shure and Ortofon among others. Properly set up, the ability of any given cartridge to track well is not noticeably different when mounted in a unipivot tonearm. This can be heard and observed using an oscilloscope. That is a fact. Cross talk for any given cartridge is not measurably diminished based on two arms of comparable quality, one double gimbal type vs. a unipivot. That is a fact. As any stylus wears I have carefully observed the patterns of wear for cartridges mounted on quality arms of various designs and have not observed any aberrations in wear patterns that resulted from unipivot arms. This has been done using a Herr-Wildbrugg microscope, Model M3 or M5 starting in 1975 or 1976. That is a fact. So based on my years of experience setting up turntables (professionally 1970-1979), and the observable facts cited herein, I will state my opinion that there is no inherent problem with unipivot tonearms. They are different and not to eveyones' liking, but functionally they are fine. If you don't like them, don't use one, but you have no cause to malign the design.
Regards,
Bill