Oh, okay, I get you now. Sounds right to me.

BTW, I have a couple of carpenter's saws that illustrate your point perfectly. Nice and sharp, but too thin to handle the force of a forward cut. Now they have a lovely "Z-shape" configuration. I keep them to remind me that a great price is not always a good deal. Maybe I'll give them to someone I want to annoy ...

[Apologies if this came up as a duplicate post. Either my PC or the server seems to have eaten my first try.]