zealous seal
Please let us use owned weapons of the same type as coatings for each other.
As it turns out, Kuji no Sada fits Vera Rozen's design appreciably better than Sariel or any of the three katana coatings on display. As such, I'd love to have the option of using Kuji no Sada as a coating for my Sariel even if it meant spending some blueprints to enable it.