Even though this pattern (see previous post) doesn't button and appears loose-fitting, I decided to do a muslin and I'm glad that I did. The back has four darts, adding a lot of shape. Two of them are in the shoulder area and two start mid-way down the back and go right to the waist. I found when I made up my muslin that the back really wasn't flattering at all. Where the hemline hit, it forced the jacket to buckle a bit, and the back just seemed to be a bit snug. Keeping in mind that the purpose of darts is not just to take in fullness, but also to add fullness to other areas, and that patterns are guides rather than bibles, I decided to reshape the dart. As you can see in the photo, I took out the original (marked with blue dots) and put in a new one that started slightly above the old dart, extended about 6 inches, coming in only about 1/4 inch at its center. This kept the cinched look, but added flare at the bottom, which I sorely needed.
Full photo (aren't washed out muslins so very flatterning???) here. The back looks like it could use a tad more work, though I don't want it too streamlined since it is a jacket.
Also picked up the lining for the jacket. The pattern itself is easy, so hopefully this will work up quickly and I can show photos in a more flattering color.