Adds old recipes back to Minecraft, such as the bundle made from rabbit hide, the lead from a slimeball, and so on. (And doesn't replace them)
Any type of copper can be used (including waxed copper) (Version 1.1+)
Any type of wooden slab can be used.
Any kind of wool can be used. It works for every armor element.
Any type of wool can be used. It also works for leather, copper, gold and iron horse armor.
Works for any diamond item too (except those that were added in 1.21.11).