SetWeaponModel always works globally

[BlackTalons]

Unsure if this is intended behavior or a bug, but specifying a reference with SetWeaponModel has no effect. For example:

player.SetWeaponModel NVDLC03WeapSaturniteFist 0 "nvdlc03\weapons\hand2hand\Big\NVDLC03SaturniteFistsRigid_Heat.nif"

Changes the weapon model of the saturnite fist to the heated version correctly, but it also changes every other instance of the fist equiped on any other character, once their render is reloaded. Tested on lobotomites and Veronica.

If this is intended, is there another way to restrict the model change to a single reference?