Decided to go with a 4’x6.5’x28” main box for the trailer I added a 2” extension on the rear frame rails and then a bumper. I got the main frame partially welded and then decided to determine how I would insure the trailer had a 25” tongue height. So I tacked on the spring hangers and took measurements. It seemed way low so I added a 3” lift by placing another section of frame rail underneath then placing the spring hangers on the spacers. That seemed to get me were I wanted based on measurements if I went with a 33x10.50 tire. So I ordered the tires for a final mock up. With myself and my son standing on the frame to simulate the weight of the rest of the trailer build and a partial load it is nearly perfect. Now time to finish weld what I have there and add in the Extendable tongue and receiver to the rear.