I finally got it cut out and put together, with the help of my 11 year old nephew. A little sanding and a few more carriage head bolts should wind it up. The 2x4's in the 4th photo surround the uprights and the one that lies between the uprights has a floor flange attached to the underside of it with the pipe screwed into it and another fllor flange that will rest against the follower. There is another 2x4 under the slide assembly that has a hole in each end that goes down over the all-thread rods to hold the hoop stationary. It has a hole drilled in the center of it that the pipe runs down thru.