Pistol:

There is no evidence of a second layer of casing stones on this pyramid...never has been...never will be.

The fact of the core stones set at a uniform azimuth and the casing at a different and not as accurate azimuth defies the possibility of the core stones set in place “after” the casing. With full knowledge that only one base layer of import casing stone is to be set in place, you apply it at the end of construction…the finishing touch…!
I could be wrong in my approach to prevent damaging the base casing stones; the only means of disproving this concept is to find one that is overlapped by an upper core stone.
G3 is constructed with granite casing stones set in place as each course was completed. The clear evidence of the core stones overlapping its lower casing stone proves it.

Best.
Clive