Unipivot arms don't. They are a cheap and easy way to build a tonearm. No bearings to adjust no tolerances to meet. Too many degrees of freedom when you only want two. Even Graham has to resort to an array of magnets to stabilize his. A stiff arm tube is not good with a sloppy bearing.
Atmasphere, IMHO I do not think speed stability is an issue with most modern turntables. I think isolation is significantly more important along with mechanical stability under the conditions that most of these units operate. Flash idea! As you know I am fond of suspended turntables like SOTA and SME. Why don't we engineer a turntable suspension that is tunable and can be modded for use with most unsuspended turntables. I do not know of an effective one and I am sure there has to be a patent in there somewhere.
Atmasphere, IMHO I do not think speed stability is an issue with most modern turntables. I think isolation is significantly more important along with mechanical stability under the conditions that most of these units operate. Flash idea! As you know I am fond of suspended turntables like SOTA and SME. Why don't we engineer a turntable suspension that is tunable and can be modded for use with most unsuspended turntables. I do not know of an effective one and I am sure there has to be a patent in there somewhere.