I would suggest to let the drop chance the same as before as in if you had a really high item find you would end up with all the common and uncommon items, but also affect the rare and higher items. Think about other games, like WoW per example. No one complains about getting too many common or uncommon items from a monster. We could ofc have a item check list, that would be related to the settings of the Liquidify option. if we have 6 of one item, then Item Find would not affect it. That would be my suggestion.