What is "visually pleasing" should never influence accuracy or completeness of information. As for "reputable" documentation that Geltrude Righetti was a contralto, see . As I pointed out on Talk:La Cenerentola, the role tables used by the Opera Project reflect the original voice type for which the role was written, as well as the most common voice type currently used for the role, if they differ. Please stop repeatedly making these misleading changes, both here to La Cenerentola. You are also invited to take this issue to the Opera Project discussion page.