Modding a SL1210 project

Hi, I've just started modding a 1210 mk2.

Yesterday installed a Denon DL301 cart, it's so light the tonearm just floats with the counterweight fully forward.

So I balanced 2 x 1 cent coins on the headshell, in total this weights 17.5 grams (cart+head+wires+coins) and then set the counterweight to 2 grams.

Good workaround or bad idea? What's best practice?

Thanks