Jon:

I realize that you are not criticizing Petrie's work...as you stated, but there was only so much the man could do under the circumstances.
Actually, although Petrie claims no evidence of mathematical relationships within the Giza pyramids I believe he though otherwise. It would have been foolish for him to publish his mathematical findings, best to stay with the measures only. But he did ensured that the world knew the base of the King's chamber was located at a level equal to the half-base area of the structure. Also that an equal amount of casing and "assumed" backing stone was missing from the base to apex of G1. He was cunningly smart like a fox and politically astute.

Your own drawing of the QC looks pretty. The drawing is not scaled and you have no measures to support your work and it is of no use to those who are attempting to fathom why these strange discrepancies/cuttings in stone formation.
You may not understand, but there are some who work with stone that realize an "odd" shaped stone is not accidental...there is a reason for it being there. As with your example, it is clear that the stone above the niche is a lintel; it prevents the niche from moving.
If you view the upper-most layer of stone in the KC you will notice the short sides utilize a single stone only, while the lower courses are comprised of narrow stones. There's an engineering explanation for this method of construction... it's called prevention of collapse.
Petrie is not here to explain his reasoning for omitting some details, but I believe overlooking obvious structural designs does not require one, and that is where researchers must use logic before leaping into a new theory.

You have also presented your own data re: the pinpoint location of the three pyramids...sorry, but you must use latitude longitude. Deviations above/below the horizontal plane do not fit into survey formulas. Those can always be added later if required/necessary. What would your calculations be if taken from the foot of the Sphinx?

BTW...the elevation between the three is extremely important...it has not been overlooked...I guarantee it.

Best.
Clive