I wasnt sure at first, but I might make use of it. After all, your plugin allows users to easily edit the default categories (will merge all equipment into one simpler category). EDIT: Was able to merge these together, thanks to your 'slot-type' filter! Grateful for that! I use the engine's default option to hide key-items quantities (they are instead to be shown in one specific ItemID's description).
However, having more than 1 causes your plugin to auto-displays held KeyItem numbers, for that specific item! D: Could you add a toggle to hide it off for good?