I made this using the 1oz of sugar and without the sugar. I preferred the one without the sugar. I think next time, I will use a tablespoon of sugar. I didn't use the 1 oz of vinegar either, just a splash. It was delicious.
This recipe is wonderful. You may need more chili paste depending on the brand you buy. The ounce of sugar and vinegar is a little tricky. Without enough sugar the vinegar causes a strange after taste. I suggest at least 1 tablespoon of sugar or use less vinager.