Control the threshold of metaball

Hi everyone, I have 6 elements connected to Metaball (custom). I would like to be able to individually control the Threshold value of each of the elements or be able to divide them into lists and control the Treshold of each list keeping a unique solid.

How can I do this?

for gh components, as far as I know, the Threshold is a single value common to all points/charges in the same list, regardless of how many values populate that list

was what I was afraid of, thank you anyway…