Hi helpful people, I have a question about gauge. I am on to my second sweater and trying to determine gauge. The pattern calls for 20 stitches per 4 inches on size 6 needles. I worked up a swatch and came up with 16 stitches per 4 inches. So I switched to size 4 needles and made up a new swatch, and came up with 18 stiches per 4 inches. My question is do I have to go out and buy size 3 and 2 and try again with those, or can I just knit the sweater in a smaller size and use the 4's Thanks so much, I learn so much here.