Bet you didn't think there was going to be a reply to this Ortho-Sonic post. Oh, ye of little faith. I have a NOS Ortho-Sonic arm. I'm not interested in selling it but I do have the original paperwork that I could copy if you remain interested.
I would be interested in any anecdotal or hard information about the use of this arm. I have a thing for srtaight line arms (Rabco, two ET2.5s, a Maplenoll table). I've never taken the arm away from its' original mounting in the box. I have thought that this arm was historically, and generally, interesting but I never thought it would be a very good arm in use. Have you actually used this arm?
I am a recent re-signin to the forum after a long while away and I can't send a personal message to you. I can receive personal messages. If you like, my email is firstname.lastname@example.org