Jon Elson fired this volley in
:

HSS dulls so quickly even on soft cast iron, that it is a major pain.
Carbide stays sharp enough for 15 - 30 minutes.

Yeah, that's probably the "old guy" vs. the "new guy" thing. They did pay
a LOT of attention to their edges. One guy used a stone, but the other one
had a nice diamond lap. Both checked their edges for a blackout on a small
surface plate.

Lloyd