> But Petrie, too, made mistakes (bless his little
> cotton socks).

Well known...well recorded and corrected MJ.

> Ignoring Smyth, the Edgar brothers, Rutherford,
> Cole, M & R, Dormion et al virtually
> guarantees a failed Pyramid hypothesis/theory.

It's not ignoring them...it's asking for all measures to be taken from the same reference point.
Smyth measure to the closest foot in some cases...inches in others.
Tolerance of possible error is omitted by most.
M&R wrote a book regarding the GP but never set a ruler to the structure.
So many factors...so many details to be considered before selecting one measure over another.
Petrie refers to others where difficulty of measure is involved (Grand Gallery). Secondary passage leading to the descending passage.

Guaranteed...if you find four or five of the best survayors on this planet and ask them to measure the distances in the passages we have discussed over the past several days then I guarantee there will not be one set the same as another.
Reason...?
There are physically too many variables in the structure to pin large distances down to the inch of accuracy.

Best.
Clive