Bill_K If indeed my 3D printed arm has a built in a/s mechanism in it, then so be it. I don't twist the wires at all (Discovery, not the Nordost...Discovery sounds better to me)..and don't use the provided A/S mechanism that is for the arm, although I've used it to compare with and without A/S. ..just a comment about the VPI A/S mechanism. I think its the best of its type, because the greater force of the weight can be manipulated to occur at the beginning, med., or end of the playing LP. I don't know of any arm with A/S that can do that.