I have a dumb question.
In these links, is the wider part of the dog hole on the top or the bottom?
See page 16…this seems to indicate on the top.
http://www.contrib.andrew.cmu.edu/~flip/wood/workbench.pdf
This seems to be the bottom.
http://benchcrafted.blogspot.com/2010/07/milling-dog-holes-and-other-questions.html