I've been reading Paul Sellers' his blog since I saw him demonstrate at Cressing Temple. I don't doubt his level of craftsmanship or his techniques, but something about the way he writes really rubs me up the wrong way. Very much holier than thou, in my opinion.
"What they did have was hollowed out stones and it was on these that they honed the bevel of their chisels only and not the flat face, which they kept the other side of their whetstones completely flat for."
Contradictory, no? How can he argue that stones don't need to be flat, then say that one side has to be kept completely flat? A month or two ago he wrote a long post "debunking the myth" about stones having to be kept flat. He only mentioned stones hollow across their length, no mention of across the width. There's no myth about stones hollow across the length that I am aware of.