Upscale wrote:

I think I get it. You're saying that teeth of the chippers overlap the
cutting area of the outside blades which gives them an amount of adjustment
without leaving any area of wood not reached by any teeth.

In a nutshell, that appears to be the basic concept behind the "dial a
width" dado stack.

Possibly something else going on when using only the two outer blades
and negative clicks for 1/4" widths, but I've been too busy to analyze it.

Magic?

....who cares!

--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)