Ok thanks Mark. It's just that I noticed that one 240mm you listed as being 1.97mm at the heel. I wondered if ALL HD 240mm were the same. But as you said it might have only been that batch of "regular wood" handled 240mm. Might partly explain why they sold out.
2.3mm is still "thin". And for home cooks it's not going to matter that much whether it's 2mm or 2.3 or 2.88 (Kono Fujiyama gyuto's).