@thomlockeI If you are willing to commit the time a non Rega cartridge is a good option. You are getting a lot of recommendations here, but you may want to start a separate thread requesting feedback from actual Rega owners who have used non Rega cartridges. These shims are the easiest to use because you don't have to take the tonearm off the turntable. You just loosen the tonearm and slide the shims under it. Make sure the shims actually fit your tonearm as I think there is more than one hole pattern. Good Luck in your search.
https://www.needledoctor.com/Acoustic-Signature-Spacers-for-Rega-Tonearms?_vsrefdom=adwords&gcli...
https://www.needledoctor.com/Acoustic-Signature-Spacers-for-Rega-Tonearms?_vsrefdom=adwords&gcli...

