I have to confess, I don't understand how you're planning on making these. From the replies I've read, it sounds more complicated than it need be.
Here is how I would do it.
I would start with a block as thick as each leg is wide, see photo.
IMG_1038 (600 x 400).jpg
First I would cut the profile on the bandsaw. Then rip legs to width. A forstener bit would take care of the mating hinge area.
(if I had a larger block lying around, I would cut two profiles)