Hide extra inventory slot

[FlawlessHair]

Hi.

There is a mod that adds extra inventory spaces, for backpack and amulet. For my mod, I want to have these slots, but I want the players to have to unlock the slots, so that it becomes a lategame help, and not something you have early game.

I've tried creating a useable item, which works fine, but I'm not sure what i have to do, to actually make that item add the slots.

What the mod does is that it adds the slots PostConstruct of the inventorybar class, which is not exactly what I want.

But I then got the idea that maybe I could hide those slots, and make them unuseable for the player, until they unlock them. I'm just not sure how.

Do you have any idea how I could go about doing that?