Unfortunately I never took pictures of the curved 36s. Imagine 4 straight 8s side by side with an a straight 4 on top sideways built into a clam shell. Looked neat. Never sounded good enough to justify the space required. After more reading and math I should have tried them with the curve the other way. Bending away not toward the listening position.
I'll try to remember to take some pics of the quad ppsls before they are scavenged for other projects.