That's a great question and one I should probably get an answer to. I've always just cooked it for the 3 hours the recipe calls for. I should be more precise.
I was just about to post this recipe. I've been using it the last handful of years. No Dutch oven, but I highly recommend.
https://www.onceuponachef.com/recipes/corned-beef-and-cabbage.html
Outstanding cook, Peter. I agree with you on jarring and selling just the adobo sauce.
Ranch water has become a common cocktail around here. So easy and so delicious.