After I taped the zipper and seam allowance into oblivion, I finally stitched the zipper to the skirt.
The directions called for stitching as close to the zipper teeth as possible. The directions didn't say anything about the zipper being open for sewing, so I left the zipper closed. This was (sort of) a mistake.
It's been a while since I put in a zipper, and I forgot that there are some tricks about when to have the thing pulled up versus down. The first side I sewed around the outside the zipper without much incident (some slightly goofy stitches), but coming up the other side was a pain. It involved planting the needle, lifting the foot, wiggling the zipper under the foot so it lands behind the foot, and dropping the foot and continuing.
Stitching so close to the zipper teeth might inherently be a pain, but I'm going to do some research and see if I can figure out a smoother way to stitch.
The back exposed zipper.The next step is to trim the excess seam allowance (the part that sticks out past the zipper tape). After than, the directions call for stitching the outer edge of the zipper tape. I am skipping the last step because I plan to remove the zipper after I'm finished with the muslin, and more stitches = more stitches to rip. I've gone far enough with the zipper to get a proper fit with the skirt.
Next up: sewing the side seams and making the waistband.
Again, if you have tips, questions, or comments, please drop me a line!