Clive,
Ronald not only belittles the abilities of the ancient Architects/Planners but he is also at odds with the experts on the pyramids. Ronald speculates miscalcalculations and ad-hoc architecture might explain the fact that the entrance is off-centre.

The experts disagree with Ronald and suggest a beautifully planned project.

" The sequence of the rooms [ in khufu's pyramid] follows an ingenious and sublime plan"

"Their [funerary apartments] arrangement is certainly not the result of several changes in the construction of the pyramid.. These are pure invention and nowhere visible"

"The funerary apartments inside the pyramid of Khufu form a magnificent stage for the ascension of the King to the heavens"

Stadelmann, ' The Development of the Pyramid Temple in the 4th Dynasty' in Ed S.Quirke 'The Temple in Ancient Egypt' (1997)