Someone thought these pyramids through very well.
If I was trying to replicate it, I’d arrange for the final finishing to occur in place somehow. With what machinery, I do not know, though if I had scads and scads of slaves that might yet do. Stretched cords are straight enough.
It’s doubted that Jewish slaves built the Pyramids, but yet the Egyptians had some fearsome magic (it still wasn’t enough to foil the God of the Jews however). Magic? We moderns scoff at using that as an explanation for anything. Well, maybe the chief reason we don’t know much about magic is that technology has usurped most of its role.
Funny you should mention that. There are tool marks on stones all over the Giza complex, that could not have been made by anything other than advanced machinery.
Check out some of Brien Foerster's videos on YouTube. He's spent years studying ancient megalithic sites around the world.