Thanks to all for a very interesting discussion. I've read the article, watched Stu's video, and it all seems straightforward, but I cannot make the geometry come out right.
Critical dimensions appear to be the 2" "stickout" of the gouge, the 6" distance between the top of the pocket arm and the centerline of the grinder wheel, and the 23 degree angle of the leg. And logically, the wider the setup jig the larger the angle and vice versa.
I've been playing around with various measurements in Sketch-Up (I don't want to dust off my weak trigonometry, if possible), and the dimensions for the jig in the article do not appear correct. Also, it appears that in Stu's video the bevel of the gouge hits the wheel above the centerline.
Does anyone have any further insight about this?
Thanks,
Ken