For the quick link to the long version of the story, here go you…
I ended up with a forehead slapping stupid mistake this weekend. I had the measurements correct on paper, and I KNEW what it was supposed to be. I was LOOKING at them just prior to setting up my stops, and went ahead and set the stops wrong, and built the whole shebang wrong anyway!
I measured heck, 3 or 4 times, I just deserve a what were you thinking you moron moment!
I need to re-measure, but I think it needed to be 20 or 24” deep. Somehow I managed to build it 16… Dummy
-- My workshop blog can be found at http://daves-workshop.blogspot.com