My apologies Hendirk, I seem to have confused some folk, So just to be clear, I should have said according to Petrie the South Side Socket base is 760 8/25 feet found here: <[www.ronaldbirdsall.com]; where he gives the figure 9123.9 inches for the South Side Socket Base. The figure 755.7500826 feet is for the South Side Casing Base. I have been told according to Petrie and other experts G1 and G3 casing did not have the indentation in the casing stones and are both considered to be 4 side pyramids, But yes G1 and G3 core configuration both have 8 sides.

So far I have drawn a blank on being able to support the cuboctohedron.

Jacob