Football Helmet Belt Hook

The Football Helmet Belt Hook allows for players to hang their helmets from their belt via the slide-over hook. The edges are rounded to make sure it does not scratch others players during play (ADDITIONAL SANDING IS REQUIRED). This is my first design, so any input is very helpful. Also, since I have moved back to the US I have lost the ability to print. So if anyone has an extra printer leave me a comment. A Ultimaker is preferable, but anything will do.