Dressing is good to do. But I have my grabdfather's grinder from the 70's and I never have dressed it. They say you should dress it if you get the outlayer coated with a metal. This will prevent it from heating up and exploding, but have never heard this happening to anyone. If you are using the grinder occasionally, don't worry about it. If you are grinding using a soft metal, it will be good to dress because if the wheel has a harder metal than what you are grinding, it become tricky. Again its not a huge thing to dress the wheel and thats why the manuals don't have that much. If you are going to be grinding for true accuracy, it pays, but if you are sharpening tools and grinding other stuff, I would spend my money somewhere else.