Customizable or not, I think the Default HUD/UI needs some improvement

[MilkieTea]

Yes that, but just remove the stone slot altogether. Have it auto-equip with the weapon equipped, save up more slots for more important things.

Stone slots aren't actually taking up space, they act more like a "yes/no" toggle, similar to the key items slots. I'd prefer keeping the stone because taking it off allows for some nifty macro hotbars :P