I had to make a 7/8" dado today. Since my dado set only goes up to 13/16" I put a 1/2" dado assembly in my TS and cut a groove. I moved the fence 3/8" and cut a second grove. It only took one adjustment to be perfect.
It was faster and easier than most dados I have cut, where you have to fuss with the spacers.
Is there a downside to this method I am not seeing? If not, I will do all my dados this way. Thanks.