Ok well done Richard I had no idea you replaced my swivel knife. (At the time
I have never Heard of a Sabatier ?
I wondered what you were harping on about in the posting above. Most of my decent knifes are German,
Sabatier sounds French ?

Anyway I am looking forward to the event. I have arranged with BR and to exchange my mandolin on the same day.
He having advised me to forget a Brass nut   instead he will fashion and fit a Cow leg Bone Nut.

Hopefully it wont explode like the plastic ones did. I quote
If it can hold up a cow it should be able to cope with a Mandolin