too funny
Maybe you have to check your arm effective mass and cartridge compliance first (you could check with HiFi test record).
Adding mass is not always necessary (or act like improvement), but sometimes you just need higher mass for low compliance cartridges if the arm is too light.
I think you’re dealing with effective mass, or you just screwed your cartridge better when you changed the screws
I don’t believe in that esoteric BS and snake oil that material of the screws can improve the sound, they are just fixing your cartridge to the headshell.
The benefit of the
screws i posted above is that mounting process getting much easier, they are bigger and can be tightened by fingers first (then with a tool), and they add mass a bit to change tonearm's effective mass a bit (when needed).