I wish I would have come across this idea years ago, It's a real Pro router dado jig.

With this jig the widths of your dado joint cuts will be perfect every time.

The guy making this video is a real shop pro. Your going to see 3 or 4 shop tips that you wish you would have know years ago

I'd make the adjustable side wider so the locking knobs could be on top and not interfere with the router.

Watch and learn.