It was clear to Petrie that the missing casing posed a problem. He said the height of the pyramid at its minimum could be anywhere between 14 inches lower than at its maximum, and the slope as low as 26° 50' or as great as 26° 54'

Within that expansive framework you can find Pi, Po, Pu and the ratio between a hair on your head and and the dandruff attached to it.

You are not alone but this is where you lose us Clive.

Graham.