Here (https://wargamingwithoutdice.blogspot.com/2025/01/cannae.html), finally is the Cannae scenario played with my Optio Vassal module. It was a huge game - the biggest Optio game I've attempted thus far. Optio is useful in that everything is numbers, so one can tweak them until the historical tactics produce the historical results. I would still change a few things to this game, but the outcome is close enough. Enjoy!
(https://i.imgur.com/NaFdUSY.jpeg)