[Aztlan] Latest LC inscription 10.6.0.0.0.?

[Aaron]

Greetings,

Despite the widespread citation of the 10.4.0.0.0. inscription from the Tonina as the last of the Classic era,  is there any substance behind Munro Edmonson's claim (see "Some Postclassic Questions About The Classic Maya") that the last such monument was actually 10.6.0.0.0. (8 Ahau) and constructed in San Lorenzo?

Thanks to all for this great forum,

Aaron