lewm
... Of course headshell offset angle and other reasons for lack of tangency of the cantilever to the groove are what results in the skating force ...Exactly, and that's been my point. We're much more in agreement here than not.
Yes, friction is a factor with LP playback and, for that matter, everything else that has moving parts. That doesn't mean friction is the cause of skating force, and you do seem to understand that. So there's no reason to continue this little debate.
but there would be no FORCE, with a capital F, without the need to oppose the force of friction between stylus tip and groove