If the bi-directional servo patents momentarily stumped JP, don't feel bad.
Best-groove, I know the DA307 has its defenders, and I can tell you that the rubber gasket separating the front end of the arm wand from the pivot point is still intact on mine, as you predicted, but my question is why have a point of discontinuity and potential flexibility between the headshell and the pivot point? Seems to me you don't want flexibility there, and 99% of tonearm designs are aimed at rigidity above all else. But I don't think the DA307 is junk; I just don't have a use for it at the moment so I store it in a shoebox. I also store my Technics EPA250, Dynavector DV501 and an extra DV505, Grace woodie, and Victor 7045 tonearms in other shoeboxes or in their factory containers.
Best-groove, I know the DA307 has its defenders, and I can tell you that the rubber gasket separating the front end of the arm wand from the pivot point is still intact on mine, as you predicted, but my question is why have a point of discontinuity and potential flexibility between the headshell and the pivot point? Seems to me you don't want flexibility there, and 99% of tonearm designs are aimed at rigidity above all else. But I don't think the DA307 is junk; I just don't have a use for it at the moment so I store it in a shoebox. I also store my Technics EPA250, Dynavector DV501 and an extra DV505, Grace woodie, and Victor 7045 tonearms in other shoeboxes or in their factory containers.