Good ideas...

But then you would be confessing your 3 failures...lol

WOW! $350 on that dado kit...but it really is pretty cool. I wish I could have one...and the table saw to put it on. LOL

I do like the first one, though. But it's not "that" hard to get a 90-degree hole with a hand drill, really. Then I just lean into it, brace myself on it, to keep it there as I go. Only way that would help me is when I am drilling above me where I can't be eye level with the work, but that's only been a few times. But also, my cordless drill, has a level on the butt end of it, so as long as I can see the bubble, I will know I am on it. With that laser circle, it would seem you could rely on it too much and think as long as the 2 circles aren't touching, then you are 90-deg, but there is a bit of play in those 2 circles, also.

2nd one, a lot of band saws and even my Bladerunner X2 uses bearings to reduce friction, but I suppose the extra set at the bottom would be an improvement.

Guess the 3rd one is the most inventive/unique. He would be better off just to sell the plans for the makeshift one that people can DIY with at home.

If I was going to drill a bunch of holes, and my drillpress couldn't do it, I'd likely get something along these lines. https://www.amazon.com/General-Tool...F8&qid=1499315765&sr=1-5&keywords=drill+guide

Yes, JOAT's suggestion is very effective. I have one that I bought over 45 years ago when I put a open baluistered railing in my last house. About every 5 years it saves me again. Fixtures can be attached to hold the work, but this tool lets you get the angle and depth of hole perfect. Any hand held electric drill works with it as the power source. It's also great for drilling in the center of round work because of the V guides in the top of the base. There are two pins that come with it that you can screw into the bottom of the base that let you drill for mortised locks or other uses where the hole has to be centered in the edge of a door or board. Just place the jig in position, rotate it until the two pins hit alternate sides of the board, and then drill the hole. When I drilled the balluster holes in the railing I made a fixture that centered the rail under the base of this tool, then I set the angle and depth of cut. I then just slid this fixture along the bottom of the rail to each marked position and drilled the holes. They were perfect.

This tool is also very handy when you need precision, straight or angled holes in a project that is too large for your drill press. With it you can drill perfectly positioned straight or angled holes in the center if a full sheet of plywood, if you should want to.

I've used mine more for drill press replacement than for any other purpose. If you don't own a drill press, this tool makes a handy replacement and it's a bargain at that price. I think I paid about $25 for mine 45 years ago. Straight or precisely angled holes are easy with it and center drilling is a bonus option.

Charley