Well I took your various recommendations and I made the most sweetest Dado's with my router you would ever want! I checked out the videos on you tube and I really liked Mark Sanguelo's (sp?) Jig. Eventually I think I will make that one. I went to a couple other videos of his and saw one on sharpening bits. At the end he said, remember every time you sharpen a bit you take off about a mm. I got a brainstorm and said why spend a week or so building a jig when I might be able to just sharpen it down. And I said thanks Mark and went out And got the blue red and green DMT credit card sharpening cards. Mark said just the red and green, but I needed to hog a little off so I got the blue also. I stroked the coarse about 30 times per side, then same for the other two. My first test cut was tighter but still had play. So I was encouraged. I had to hit it two more times each for about 20 strokes. When I finished the last test cut it was a good fit but it didn't tug on the board. I decided to stop while I was ahead. When I made my first final cut for use, it was absolutely perfect. Like a kiss, it just tugged on the board a little. I really was surprised, maybe my test board just got a little worn. I only made one mistake in all 6 Dado's and since my cabinets are two side by side I figured don't repIr, just flip it over and turn it upside down. So I have 6 Perfect dados. Thank you for all your suggestions. You all are the best help group I've had in woodworking.
Tips? I wouldn't attempt this unless you know the rules to sharpening blades. If you don't hold it flat or if you don't sharpen both sides of the bit the same you could end up with a disaster. But if you have learned the right way to do it, go for it. The shanks on my bit set are all 1/2 inch, so I won't be able to do the smaller blades, but they will be perfect for the jig Mark has. I will post my other unconventional methods for this task in a new post.
