Modified outfit mesh crashes to desktop when equipped

[Obryanov]

So I'm trying to put together a custom outfit made of different mods for personal use, but at least two of its pieces cause CTD on equip. I tried re-importing everything as OBJ and ensured textures were for SE, but it happens anyway. My only guess is that since I duplicated some meshes to make them different on inner side and then merged the copy with the original mesh through Outfit Studio without doing anything afterwards, something broke, but I have no idea how to fix that short of deleting both, which I can't really afford to.

Could someone lend a hand here? Offending meshes are included.

Specter.nif SpecterCape.nif