#5 I agree, well said.
Agree w/ #6 and 8.
#9 Interesting take, and a distinct possibility.
#10, No, it doesn't get any easier, and it's a plausible Theory....more than most here can say......
Campbell's Chamber roof blocks are Tura Limestone until proven otherwise.
THE Cartouche in Campbell's Chamber IS Authentic, as are ALL other RC's Glyphs, until proven otherwise.
"This Forgery 'theory' has more holes than a sieve basket."