Got it. I may try this soon. Will let you know.
As far as carnitas go, I have cooked them a couple ways. The traditional confit method is pretty hard to commit to because you need a freaking gallon of fresh lard. I did it once, but I guess my slow cooker cooked them too fast and they weren't as tender as they should be. No matter, I partially shredded and browned in the skillet, using some of the lard to keep them from drying out and burning, and it also makes them even extra rich. The confit method already makes them tasty very rich due to the fat, but adding it in the skillet really really makes them rich. I won't try the confit method again for a while, though. I got better results with an acid-based braising. Used fresh orange juice (1 cup), fresh lime juice (1/3 cup), whole milk (1/2 cup), jalapeno pickling liquid (1/2 cup) as the braise liquid. Also, had a chopped onion in there and a bunch of fresh garlic (crushed). I did brown/sear the pork after generously salting it, then plopped it in the Dutch oven and covered (or close to it) with braise liquid. Cooked in oven between 235 and 300 F, starting at 300 F and gradually reducing to 235 F over the next 3-5 hours. Probably can get away with 2 hours, but I think it needs at least 3. I used the following recipe and tweaked it to my intuition:
https://www.saveur.com/article/recipes/carnitas-pork-tacos/
If you make them this way, and you make the salsa too, I suggest not putting tomatoes in it. Carnitas should have a nice salsa verde to go with them, not red salsa roja, in my opinion. Serve on corn and/or flour tortillas with cilantro and onion. I like to cook the tortillas in a little fat on the skillet or even on a conduction stovetop. I prefer fresh tortillas, but that's something I rarely do.
Anyhow, it's a very simple recipe, but it yielded the best carnitas I've ever made.
It's funny you mention birria tacos. I just watched the entire Taco Chronicles series on Netflix the other day and birria was one of the taco types. I've had birria before, but I suspect it was sub-par. It's a tough one to make taste right and can taste downright nasty if you don;t do it correctly, per Taco Chronicles. I HIGHLY recommend watching this show if you love tacos.
Cheers!