Slow cooker Sichuan pork shoulder noodle soup

I saw this recipe and it looked awesome, so I just made it in the slow cooker. My recipe is adapted for my pantry and the slow cooker.
I used boston butt in mine (it was on sale), but I suspect it would work with other fattier, tougher cuts of pork as well.
It was very tasty and very spicy. If you're going to try this recipe and sichuanese food isn't your fave, I would cut wa-ay down on the chilli paste. My apartment smells like a chinese restaurant and it makes me really happy right now. Specially since its really cold and really grey and this is exactly what I would have wanted to go out for!
We cook a lot of chinese food so we already had toban jiang in the fridge, but its actually pretty commonly available at stores in the ethnic/asian section. If you have sambal olek that works really well too as a substitute, though I personally think sambal is a little spicier. We did not have black vinegar so I googled a substitute and balsamic+some other vinegar+sugar seems to do the trick. I also added a tablespoon of brown sugar instead of one of the tablespoons of white sugar. I have no idea if that helped. I first cooked it for 4 hours and the pork was very done, but not falling apart, so we let it go for another 45 minutes.
If I make this again, I would also dry roast and crush a few sichuan peppers and sprinkle them on the soup after it cooks.

Ingredients

2lbs pork shoulder-cut into 1" pieces
12 cloves garlic, chopped
3" fresh ginger piece, peeled and chopped
4 Tbsp Toban jiang
1/3 cup red vinegar+balsamic vinegar
4 Tbsp sugar
3 Tbsp soy sauce
3 Tbsp cornstarch
4 scallions

Method

1) Add a little oil to a pan and on high heat fry off the pork pieces. I waited till they were browned (5-6 minutes). Don't crowd the pan. I actually removed about a fourth of the pieces after they were seared and dumped them into the slow cooker and proceeded with the rest.
2) Toss in the ginger, garlic and chilli paste and toss the pork around to coat. Cook for about a minute, still at high heat.
3) Add in the soy sauce, vinegar and sugar and stir them around for 3-4 minutes until the sugar dissolves.
4) Add everything to the slow cooker along with 8 cups of water.
5) Cook on high for 4-6 hours.
6) Take out about half the liquid and boil it on the stove and add cornstarch dissolved in water until it thickens. Add it back to the rest of the soup.
6) Serve with noodles and chopped scallions.
7) If you prefer to remove some of the fat, let the soup cool either in the slow cooker or in the fridge and then skim off the fat from the top.