I really like Charles Hayward. I downloaded one of his books from the Toolemera website a while back and have thought the articles in there were all gems.
Not having a drill press, I needed to drill some accurate 3/8" holes to finally finish off my leg vise install. Looking through Hayward's book, I found a jig that does just that, "For Boring Accurate Holes."
Building this was fun. I used walnut, maple, and mahogany scrap. It took about two hours, and I learned a lot making it. Especially the part of excavating a big square hole.
It worked, too! Sort of.
It takes a long time to set up just so, there is a lot of play, and you have to readjust it after drilling about 1/4".
After boring the first half of the four holes I needed, I gave up and went free style.
Thanks to the practice I did before ala Aldren Watson, I am now skilled at drilling holes freehand.
The result: All of the holes I drilled were as perfect as they need to be.
The moral of the story: Don't waste time building jigs to help you with operations that are basic skills. I guarantee you if you practice boring straight holes as Aldren Watson says for the time you need to build this jig by Charles Hayward, you will have the skills you need for accurate boring on this project and all to come.