I would have thought you could adjust the VTA without fiddling with the cartridge? FWIW my own limited experience of this is from my Io2 in an Audio Note arm, complex geometry tip and a slightly awkward VTA adjustment. I suggest if you can be bothered to follow through that you move in sizeable increments first. If no difference then ignore. If it makes a difference tweak to perfection. Don't get hung up on 0.25mm here and there though, that way lies madness...
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