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Never done it on the new 3 point mount but have on the older RB250.
You will need to be able to realign the tonearm afterwards as I believe you need to remove it to fit shims
anyway fitted my at vm540ml cartridge without a shim and so far all seems good but i might still put some 1mm washers under the tonearm fixing screws to move it up slightly. I can`t go up much more than that as the tonearm weight will hit the lid.