Only a comment on the ratio of 24/25.
This ratio occurs in two sets of measures at least.
1st the Roman and Greek 11.664/12.15 and some confusion re the length of the mile.
5000 Roman feet equals 4800 Greek feet but only 4860 imperial feet.
The old Saxon measure 13.2 inches has a mile also of 4800 feet but is equal to the imperial 5280 feet exactly.
Further the metric side of Saxon measure with a digit of 0.792 inches and a foot of 12.672 also makes a modern mile of 5000 feet equal to 5280 imperial feet.
No wonder the confusion.
Also a thought on making a Royal cubit fit all pyramids etc. No it does not have to as it is simply a part a cog in a wider wheel.
For instance with the third pyramid the foot imperial and Indus/Saxon are the driver base 324 Saxon perimeter 1296 feet but in Royal cubits 829.44. So the foot is the driver here.
The architects used digits,feet,cubits,royal cubits,rods,fathoms,furlongs,miles and more.
The also used the old metre for example the third pyramid 356.4 imperial feet or Saxon 324 feet / 3 = 108 metres.