Probably not as much as a nightmare as you're thinking. Actually, I believe it would be especially easy to assemble. Since it's so segmented, you can glue up one piece at a time. And nails or screws can be driven into the joints to aid in assembly.Maybe not magic Bernie but the glue up and the clamping is definitely a nightmare!
Your right the original is different than the later one.old thread, but the later pictures are clearly different than the original. the original is much thinner and the other method would never work. SOmeone made one more recently, he laminated a bunch of sheets of plywood together and used a flush cut router to match each layer to the last I think. Lots of waste but it got the job done.