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Thanks Bob, that makes sense now. Presumably you are also able to hone the blade when it needs it too?

It's still not entirely clear to me what the funny shaped wire frame thing is for. I have seen a pic with the blade going into the handle so I sort of get how that works and the 2 strops seem fairly...

I like the way they are patented in England and abroad. Not anywhere specific, just "abroad" :)