[MrB]

just to throw in some info I found out. I know someone in the wood working industry and saw this saw at a trade show, he said it puts on an awesome demonstration, but they don't come out and tell you it costs over $200 per catridge. I think he said it was some type of a block that gets jammed into the blade to stop it from spinning.

That is great if it saved soemone's fingers, but in a high school, i could only imagine how many times it may accidently be set off (costing $200 each time). Assuming no one is dumb enough to try it with fingers, but what about a wet towel, wet wood, food, etc...

Soudn sgreat, but from what i've heard it is a bit overpriced.

And NOTHING beats proper safety practices..