They may have used some system we are over looking.
I commend Nova, Mark and Rodger for their attempt to demonstrate the potential building methods. I found the movie to be entertaining, and worth watching.
Rodger's very low ramp angle (1.5 degrees) would be interesting to find out, if I calculated it properly. I also reconstructed their Pyramid in Sketchup, and the 186 stone figure seems correct. My blocks were slightly smaller. It appears the Pyramid served as the ramp base. Could be wrong, and it's acceptable regardless. I am done concerning this.
I was locked out of Photoshop for awhile. Need it for the Quarry estimate.