I don't know about redo/fix, and I'm not sure how far you'd like to take this to make it more key-ish.

Perhaps...add more teeth? Make the teeth more jagged? Add an indention/groove to the side of it (image below)?



Of course, I'm also not sure if that would make it too key-like, and you don't want that...maybe a circuitry-design-shaped groove on the side?

I dunno...play with some ideas, or just on into texturing