Rega used to make a special heavy version of the tungsten counterweight. Rather than ask us and get 101 different recommendations, why not ask Rega directly? Anyone would think they know nothing about the products they make
Sorry, the Michell weight certainly looks the business, but seriously, see if Rega still make the heavier tungsten option. The larger diameter stainless steel weight was a cost cutting option I think, but didn't affect the sonics, so a good move for them.
Tear down these walls; Cut the ties that held me
Crying out at the top of my voice; Tell me now if you can hear me