I've just purchased a Helle knife.
http://www.prodat.no/LoopSites/helle/sites/helleeng/go.cfm?id=69256&type=text&lang=nob&path=0,66168,69254,69256
I bought the 'Odel' from JLS
http://www.jls-wednesbury.com/default.asp?p=5990
I have, on my two existing knives, used an angle grinder on...