Carriage rear receiver hitch?

Here are some sample pictures of the hitch I built for our '95 Carriage. The frame here is 2x6 box over 2x6 box for the majority of the trailer, however, the very rear portion has just one 2x6 overhung for a short distance. By removing the bumper I had access to the 2x6 and slid hitch components into the main frame. I didn't like what I saw from local fabricators, so I built my own. I hope this gives you some ideas.