The message
from John Rumm contains these words:

Though my current 330mm chopsaw blade has gone through 20 slices of 50 x
3 square box, dozens of bits of 50x5 flat and 50x50x3 and x5 angle and
is still not fully through.

Is that an abrasive or a diamond disc?

Abrasive.

--
Skipweasel
Pay no attention to that man behind the curtain.