So i went on a shopping spree today and got all the things needed to make everything for my new ferret nation. I was just wondering if some of the metal things I got was safe. I got snap hooks to hand the hammocks which are aluminum, eyelets like those metal holes on tarps (I'm not sure what type of metal that is, but I got it in the material section in walmart), and screws and fender washers which are going to be on the outside of the cage, with no chinnie contact. Did I do good?