No, there aren’t. The best I can do is measure the drawing from Ryan’s table design which I found here . You can see me going through the process in this very topic.
The overhang should be equal on all sides. It’s configurable in the UI.
Your drawing looks right (I see the same error). However, I have built two tables from this and neither were too small (if anything, they were a bit too big?). I will go over my new table tonight and try to confirm all the measurements to see what’s up.
Having the table be slightly too narrow is actually the better case if they are off in either direction, because attaching the rails slightly wide will still give them the full support of the side rails + most of spars.