More comments after actually down loading the pics.

At first I thought the "tubing" in the middle was actually that; tubing for compressive purposes, and I wondered why it did not go all the way from vertical stack to vertical stack. But after studying it for a moment I realized they were probably just threaded connectors... right?

Also, why not carefully spread some JB Weld at the junctions to prevent leakage?

Very nice looking,
AV8TOR