Tanks Neatman, but the lapping will snooker me I think- I'd need to have some ceramic or synthetic ruby lap angled at the tool's top rake (typically 5 degrees) reciprocating back and forwards with say Engis or Hyprez Diamond Compound. The mess and setup entailed would probably be just the same amount of hassle as setting up a totaly new tool
heh, but it was nice chatting about it. Like I say, you know your stuff!