I've made progress on my DGS's sweater. I've managed to finished the sleeves.
They were knitted together, so the lengths would be the same. The stitches are identical to the stitches in the hat. My only new experience was increasing in the loop between the two stitches. This sweater has raglan sleeves. It's important to have two rows of a stockinette stitches along each edge.
I couldn't wait to start the back with all the fun cabling. The first inch was my challenge. I couln't see the pattern right away. However, once I saw what was developing, there were no further difficulties. It will be knitted straight up with no increases until the decreases for the sleeve edge. The right and left edges are the same stitches as the sleeves and hat.