The rear panel tubes are done. I decided to use 1" square instead of the 3/4" round. I hope that doesn't bite me later. The way I made the top rail was to cut one stick to length. Then I marked out where the radius of the bend would be and cut out three sides of the tube. I cut a piece of wood into a pie shape with the crust having the right radius. Then bend the tube around that, cut up some sheet steal to box it back in and welded it up.