Above you wrote: ”Of the many workmen's graffiti marks found on the underside of the blocks that cover Khufu's southern Khufu boat pits, one notes the 11th cattle count which given only Djedfre's name is found, not Khufu, implies this was the 11th cattle count under Djedefre's reign. There is some debate whether the cattle count occurred every year or every other year, but this would mean that Djedefre was making these boat pits some 11 or 22yrs after Khufu's death/end of reign. As noted in the picture above, there is also a secondary temenos wall running over the top of the boat pit meaning this too would have been made sometime after the boat pits were made.
As I have noted before regarding boat pits in general, this practice was seemingly abandoned after the 2nd Dynasty in which for reasons unknown, if they are even related, Djedefre revived the practice…
The evidence strongly suggests Djedefre was responsible for the southern boat pits…”
From 2001, Miroslav Verner’s account addressed the ambiguity of the interpretations among the scholars of the time regarding the then known markings discovered on the roofing blocks of the pit for Khufu I.
Ten years later, in 2011, the Director of the Waseda University Mission Team in Egypt, Sakuji Yoshimura, reported regarding Khufu II that [“i]…while the fillings around the sides of the covering stone were being cleaned, the team uncovered the cartouche of the Fourth-Dynasty king Khufu inscribed on one of these blocks, and beside it the name of the crown prince Djedefre. This, he argued, meant that this boat was constructed during the reign of King Khufu and not, like the first boat now on display at a special museum on the plateau, during the reign of his son and successor Djedefre.
The generalization does not hold; Khufu was still King during the marking of the blocks roofing the boat pit for Khufu II.
“Quis custodiet ipsos custodes?“ - Decimus Junius Juvenalis
“Numero, Pondere et Mensura“