4 survey points in a line and "if you measure 40 cubits from that point [his key point]. out there you get exactly the angle of the pyramid"

For starters not only does Romer know the correct length of Khufu's royal cubit but from it he gets the exact angle of the pyramid, 51° 50" Some of the best survey ever undertaken on Khufu's pyramid have not determined the length of the royal cubit. They get close but always with + or - tolerance.

Romer doesn't need royal cubits with tolerance to get his "exact angle". Apparently he maps out his grid on a grandscale by ignoring tolerance and the multiplying effect that comes with it.

I believe Petrie for all his trouble arrive at +/- 7 inches for height.

Now move back to his previous statement about the angle of slope taken from the Northern casing stones (If you don't recognize them see Jon's site).

"Now this angle has to be so precise because if your a wee, wee fraction of a degree out where it takes off from the bottom you're gunna be yards out up in the air, up there"

So is it exactly 51° 50" Mr Romer ... it fits your grid. No yards out in his mind now.

Contradiction, Manipulation, Deception and just plain wrong.

For the data on the casing stones see Petrie.
For the length of the royal cubit see Petrie.