I know very little about working with steel - let's get that out of the way first. In the past, I've been very cautious when working steel on the grinder, fearful of damaging the tool by overheating. However, in viewing sharpening videos on the internet I get the impression that HSS is more tolerant of heat. I'm about to create a swept back grind on a Hurricane bowl gouge, and I'd like some advice. In the videos I've seen, folks are happily grinding away for a minute at a time, and in some cases not cooling the tool in water at all. My grinding wheel in a Norton ceramic alumina - how aggressive can I get, and what should I watch out for?