You dont have to dup anything or change any bp files. not for the smithy.
All i did was create a engram for my dart and its other files. ammo etc.
Added it to Additional Engram BluePrint Classes.
and for Additional Structucre Engrams in the PrimalGameData i used.
To the ASE i added…
- For class: -> StorageBox_AnvilBenc
- Class Additionals: -> PrimalItemAmmo_SimpleRifleTranqDart