I used some one else his diamond sharpening stone to sharpen my Swiss champ. I got to say I was really impressed with it because before I always struggled with getting this hard blade fully sharp again and mostly left the job half done. Now I can cut the hairs of my left hand with it.
the one shame is I can't remember the name of it but this is the description:

A light blue plastic blade-strait 2cm wide up to 8cm in length. On top of the plastic sits the diamond slice. Same measurements only you can see blue spots all over the diamond surface. This is how it is held in place.
I can remember that it was an American company who made them. Any one got any ideas?

Reinhardt