I would run mine somewhere between 24-36 hours. I have an old cooler that I use (don't use one you actually like because the extended heat exposure warped the cooler walls some lol). I have a cheapo stick circulator that I picked up at Aldi for $25 over 10 years ago. I haven't seen the sense in getting a Joule or fancy set up.

I cover the cooler with aluminum foil because plastic wrap would not hold up. Then I blanket my little DIY pork bath in a beach towel to help cut down on evaporation loss.

The recipe that I used before suggested broiling it to finish. But like you, I now have a wall oven that can do convection. So I'd like to try it at 550 and see how that turns out.