Hello Dr. Trog,
Here is an interesting construction, based on Petrie's cubit dimensions. 1 Egyptian cubit = 20.6".
If you leave room for the Casing stones, the work area increases to 36.65". Leave off 3 stones, and it increases to 61.80". I do not know this answer, and I realize you are not completely behind the Shaduf theory. Thou to be fair to Thanos5150, I want to do my best to prove his concept has a possibility, or not. My question is, when climbing Kufu's Pyramid, with the casing stones missing, are you stepping on a surface made up of cubit stones, or is it only one stone. This should be plain to see.
Here are a few observations.
1. The stone must travel on a wood platform, otherwise you would have an issue attaching and unhitching each stone.
2. Each time you lift a stone, and place it on the next level, it will rotate slightly. Not a big problem, as long as, you are connecting in the center.
3. Rope tensile strength?
4. Beam load strength.
There are load beam considerations, though using Petrie's cubit, this scenario has no reached a sensible outcome. 2 men could operate this machine. Still, this only works for small stones. Larger casing stones, in my opinion, would overwhelm the system. I'll post more, if new revelations come to mind, for or against this proposal. I must admit, this is more encouraging, though is there really 2-3 stones under foot, once you pass the 36th level. In addition, does the same hold for Khafre.