When I made Red 'Endgame' Link I realised the advantages of being able to customise your own version. The first step would be to create a set of items all scaled to Link and my other models. Although, it took a lot longer than I thought! (Mostly because working on things like items is such a chore compared to character models). For now the items are limited to those seen on the "Equipment" screen in the menu.
Why does the Giant's Knife look identical to Biggoron's Sword?
The actual models wielded in combat seem to be the same. The Giant's Knife was really just included for a laugh, and for completions sake.
Difficulty: Variable but mostly easy. Swords are harder due to their small size and detail.