@atmasphere, The Schroder CB's bearings are ceramic, even harder. It is reported to have the lowest friction of any captured bearing arm made. Whether that is true or not I can't say but it is a very sensitive arm and it will move with just the air currents in the room.@mijostyn
Do they have any play in them? That's always been the tricky bit.
Stiction is a real word. (There's no 'k'.) It means just what you think it means.:)