Since Lowe’s let me down and failed to deliver the cross connector, I reconfigured using the parts I have and learned a couple of things. First, 8′ wide is HUGE and it is sagging in the middle. I need a new footer in the middle for support. Here is a diagram of what I have now. It works really well, other than a little sag in the middle.
So returning to my original design, I updated the diagram to add a second cross connector to build another footer. I need TWO cross connectors to finish.
But this was really easy to put together if a little unwieldy. The PVC cutter tool proves the axiom use the right tool for the job.