i'm roy underhill. glad you could be with me again today, because we have with us our good friend, author and editor of "popular woodworking" magazine, christopher schwartz. christopher. hey, roy. you have done so much for woodworking. but here now you're trying to introduce a class system of sawing? what is this about? yeah. here i'm doing a second-class saw cut on this to produce a tenon cheek. a tenon--all right. so what is this, though? american--come on now. american sawing-- we live in a classless society here, and the way you saw is you roll up a barrel. sure. you put your wood down, you get your saw, you cut your wood, and there you go. all right. now, that's american. now, what's wrong with that? why do you need to introduce classes of sawing? yes. well, robert wearing, who gave us the 3 classes of saw cuts, would say that, you know, there's the third class, which is rough, but i think you've found the fourth class. all right. ok, mr. smart sawyer then, why don't you take us through these stage