In a message dated 7/7/01 10:30:43 PM Eastern Daylight Time, davsal@iinet.net.au writes:
> The results look fine and it would solve my supply problem, but do the cones
> need to be heat treated to provide long lasting results?
>
I believe most cones are surface-hardened, so if you re-grind them they wear out nearly immediately since they are already down into the soft metal.
Glenn Jordan - Durham, NC