Well not really. Much as this looks like a cool cocktail, it’s the sleeve drive pin being quenched. The whole jar became too hot to handle, so there was plenty of heat in the pin. Rock hard! Now to temper it.

When it had come to a reasonable temperature, we gave it a wipe and warmed it up again – this time to a dull red. From there into the oven at 200°C for an hour, before allowing to cool slowly.

Next up, it grinding to size on the cylindrical grinder.