Heaviest Headshell?


I'm trying to find the heaviest headshell out there to use with my SME M2-12R. So far the winner is the $300 Ikeda Titanium which is 20g. Any suggestions?
dhcod
I know but not enough weight. I have 3 quarters sitting on the headshell now which is like 18g with the Blu Tak. I'd like a more permanent solution. 
Certain FR headshells can exceed 20g easily. You’ve glued 3 quarters to a 20g Ikeda? What cartridge?
No the quarters are on an sme headshell. The cartridge is a Decca London Super Gold.