ArlequenMy SL-1200 is an old one that had a hard life previously. It could be the motor mounts are loosing it's grip on things and the edginess I hear is due to transmitted vibrations to the deck itself. As I had said in another post, I'll likely ship off to KABUSA for outboard motor and strobe disabler and we'll see if that does the trick.
sfox50The damping trough is heavyweight aluminum foil....the silicone bath is 30,000 or 50,000cst oil bought from either TurntableBasics.com or Tower Hobbies ('differential oil' for radio controlled cars are the same silicone and lots cheaper bought this way).
The damping trough experiment told me in no uncertain terms that damping with fluid bath (or my current JVC has internally oil damped tonearm in both vertical and horizontal planes) is a fantastic upgrade for vinyl fanatics. It allows for lower noise floors.
The clay on top was a great sonic benefit...as I knew it was a tester table for me, I went for it

John