Big cartridge screws?

Why would you adjust your cartridge screws, by hand or otherwise?

Once overhang and zenith angle are correct, they are snugged down and need not be touched again until you change cartridges.

Agree these are useful to add some mass at the headshell.

Once I have a cart properly aligned and dialed in, the range of VTF tweaking it needs (and I tweak VTF almost daily) is not enough to make realignment necessary. My VTF tweaks are rarely more than a few thousandths of a gram.

YMMV, as Sunnyboy said!