[outofsalt]

"They use 4 large C-clamps, two on each side of the stones, to form a circle - then rolled them into place."

If you didn't have cell phones you might spend a summer doing this as a kid. Kid builds a pyramid and a swimming poolwith ancient skills!

[impactplayer]

That would work also - but they found these “C” clamps among some diggings a few years ago - or so they so. No one really knows with Egypt.