A very nicely done article. And I sympathize with your frustration at the intellectually constipated inhibitants of academia.
I bought (another) book on the Celts the other day, written by another "Celtic expert" and it begins with the usual map showing they originated in Germany (WRONG!) and migrated outward from ther (WRONG!). Then, copying most other books on the Celts he says in the very first sentence "At the start of the first millennium BC...(WRONG! No trace of them until ~600BC, and then in Southern Russia, Turkey, etc.) These guys never read FR to learn about the latest Archeological finds!
Anyway, I like your post, but wonder at your concern about not being able to move the 220 lb rock in a canoe? That is only the weight of a large man. I don't see the problem.
Still, maybe you might be right, if the stone-cookers of Manitoba had had aluminum canoes...