I did use (2) SLK 32 hitches to start with, got them off ebay. But they are nothing like what they started out as, I cut them apart and flipped the horizontal bars. I also added 5" to the removable tow bar sections and drilled new pin holes so that they would clear the bumper. If I was going to do it raw a second time I would nock it up out of cardboard and have a machine shop make the parts. I would allow someone with the computer technical ability to measure mine and do up a set of prints, as long as the finished prints would be free to everyone else. The bridge is just a piece of 1/2" stock with (3) 3/4" holes to bolt the hitches together and attach the ball. I'm using a 1 7/8" ball and will try to post some finished product photos tomorrow.