I saw this new idea for a dado jig on Andrew Kleins instagram.

Watch the video from the time where its used @ 3'13".... then skip back for the "make" if interested.

The plans are freely available on his site: Dado Maker

I'm super impressed with it. It is essentially a kerfmaker, but perhaps a little more approachable (people find them confusing at first, even though they are utterly fantastic).....