I need to make an indoor shot put ring for my throwers. I have no idea how I would go about making this because I don’t know what to use for the spinning surface, outline for the ring, etc. All wee have right now is a home make toe board, which works, however I want the guys throwing from an actual ring. Can someone help me and give me directions on what to use to build an indoor ring? Any help is greatly appreciated! Thanks guys!