In no way did I mean to denigrate the Saw Stop. My point was that you
can still get hurt with it.

In retrospect my answer was probably more reflexive than it should have
been. When I teach safety I emphasize that nothing is completely safe
and I show how it is possible to get hurt no matter how far fetched.

I once had an employee raise a guard and put her hand under a cutter
then flip both the on switch and the master safety switch while her
hand was under the cutter. When we designed the machine we were sure
no one was going to get hurt with it. Fortunately she wasn't hurt
badly because of the safety aspect but she was still hurt.

When we build equipment, we never tell people it is safe. We always
emphasize how to use it safely. We also always design in as much
safety as we can.

tom