Yes, I did a design for my SO3 at:
That said, why do joinery this way?
A Full-blind box joint is a lot easier, and reduces the number of setups from a minimum of 3 (cut parts to length, secure all 4 boards and cut 2 corners, flip and cut other 2 corners) to a single setup for each part.
I’ve been working on a simpler method to do this sort of thing.
If you have an example project and can let me know all the parameters we can walk through it with you on the forums.