Audio Technica AT 666 vacuum disc

@best-groove round elastic for men's socks, what is that and where did you find it?

Also, for future reference, I remember reading that air leaks can happen with the valve.  If you're not able to correct that then a good bike repair shop may help.

raul, didn't you comment a few years ago that you found the AT-666 improved your SP-10 Mk2, even without using the vacuum feature?  Possibly better inertia from the (then) heavier platter?