Ok I don't have a flat on the arbor so I'm stuck with one wrench and a piece
of wood wedged in to get the blade off. I also tried a Quick Clamp on the
blade and that works well also.
My problem is tightening a new blade on. The wedge doesn't work in the
opposite direction, but the Quick Clamp does. That eliminates blades
loosening when the saw is turned off and starts to spin down.
So...what is my problem? Stacked dado heads. If not tight enough, power off
the saw any I get a bunch of expensive carbide clacking together. The clamp
squeezes them, the wedges slip. Other than grinding a flat on the arbor ...