Authentic RSC requires your wielded items to be part of your inventory. RSC Cabbage bypasses this, by creating a second tab on the 'inventory' menu.
It's now a 'split tab' (like magic/prayer) but the worn items end up in a separate interface:
To do: IMAGE
This obviously helps in a lot of places: you can carry more resources (food/potions), haul more loot, etc.
The bank interface also lets you load items directly into the worn equipment slots (toggle inventory / equipment with the items at bottom left of the back interface) and even lets equipment setups be part of your bank presets.