I would like to connect my Fa/b with a drawbar to get them as close as they can get . After several failed attempts, I need help, the crude bar I used works well going forward(what wouldn't??) but binds backing up.Basicly all I did was take off the couplers and put in a small piece of plastic with a hole in each end for the coupler screws to go through. I need a better mousetrap . thanks