I found a woodworking forum reference to my Advanced Box Joint jig plans, asking if anyone had built it: Advanced Box Joint Jig – new to me!
You’ll need to read the first few posts to follow what I say next.
(edit: forum thread no longer exists)

Interesting. I’m not one for joining forums to have my say (not that it’s actually possible, in this instance, since you need to be a resident of North Carolina to join), but I would like to take the time here to correct a couple of the points in the thread.

First, the jig in question was designed by myself alone, although I did have some very key input from my brother Don during the initial planning. I didn’t get any assistance from Matthias Wandel and it is not his design. It’s not clear to me where this idea came from, but I can say that it is false. My previous collaboration with Matthias was on a simplified version of his screw advance box joint jig, but this has since fallen through.

Second, although I appreciate the forum member saying that it would be an effective jig if built and used correctly, I can’t see where it would be a drawback for a jig like this to be limited to 1/8″ to 1″ by 1/8″ increments. I really can’t see the purpose of making box joints smaller than 1/8″ or of an odd size. Maybe I’m missing something?

Third, it does depend on the dado set, but not to having it set to precise multiples of 1/8″. The fact is, you need some clearance for the joint to go together and that’s were the shims that come with the dado set come in. You’ll set the dado up for the box joint size and add a shim for clearance. The use of shims is in fact the micro adjustment – no other adjustment is needed. In the video referred to, I used a .2mm shim so that the joint would slip together easily. Using a .1mm would have been just right.

Fourth and final point: The division plate can actually be cut on a standard table saw, without the aid of an auxiliary fence system. I demonstrated this in two videos, if seeing is believing. The place to start before attempting the cuts is to make sure your saw is properly set up and you can get reasonable accuracy with the fence. This is something that any woodworker with some experience should have done anyway. I can easily set up and make cuts on my table saw that are within 10 thousandths of an inch. I can do that on pretty much any table saw, for that matter, even a cheap portable one, so no excuses!

So, there it is, my retort. It’s all good and I understand he has an agenda: time and effort invested in his own design that he feels he needs to promote. Would have been nice if he had sent me an email to clarify some of the points beforehand, but it probably wouldn’t have made much of a difference.