Jon:

Thanks for the photo...I thought you would find one to help explain.

Tell me:
Did the builders set white limestone blocks from base to apex on this structure as they did with G1?
I presume you took the photo in recent times because it looks nothing like it did before Hawass closed the road...do you remember?

See:

This is taken from the east base of G1 looking directly at G1b…notice how neat the base formation is.
And this one:

A view along the west sides of G1a-b-c. Notice how neat the base of the small pyramids are. Where are those white casing stones?
I’m presuming you know where the black stone originated from. Question is…How did they get there?
As you know…the van to the right is aprox 100 meters in front of the G1d’s base location.

Best.
Clive