Hi Gav
Thanks for the response. I think it's of interest too. Especially since it seems to follow in the tradition of the shikomizui.
Hi Thilo
Thanks, I shall bear those legalities in mind.
Of course, it's not illegal if the two pieces are separated, because then it's not a concealed weapon. It's only illegal with both pieces together.
Something to think about.
Thanks for that tip on lacquer. That is odd. Perhaps they believe it protects the blade.