Very good to hear this review! I already dug my pit down 10 inches and packed about 4 inches of CA6. At this point I wonder if this would be an improvement over using only sand for leveling.
What was the price per panel 7 years ago VS purchasing them today? I think I am going to try these BROCK panels. There are also gatorbase panels 3/4 thick, for purchase now. I am going to put Porcelain Pavers 3/4 inches thick, 24 x 24, 12 x 24 and 24 x 36 into a 225 sq ft patio, a large triangle. When its done I will let you know how it came out using the BROCK panels (20 panels right now is 209.25 at Home Depot.