I use Acoustic Signature spacers on my P9's:
https://www.needledoctor.com/Acoustic-Signature-Spacer-Set-for-Rega-Small
They also come in "Large" now - - not sure what the difference between the sizes may be. When I got mine in 2015 there was only one size (AFAIK).
https://www.needledoctor.com/Acoustic-Signature-Spacer-Set-for-Rega-Small
They also come in "Large" now - - not sure what the difference between the sizes may be. When I got mine in 2015 there was only one size (AFAIK).