For instructions, I used a combination of the tutorial from Els and the instructions in Bernina's Features Book. I have the Bernina invisible zipper foot #35 and wanted to use it. With the foot, it is not necessary to press the coils. For these instructions to work, the zipper has to be at least one inch longer than the opening. My zipper was just a little over 1 inch longer. I started pretty much like a centered zipper: stabilized the zipper opening, sewed up to the zipper opening point and basted the zipper opening. After pressing the seam open, I removed the basting. Thank you, Els, for this info which helped me a lot. My pressing showed me exactly where the zipper needed to be stitched. The zipper coil is placed precisely at the pressed fold. I pinned the right side of the zipper (Bernina does right side first, Els does left side first), checked it was in the right place, basted it, and sewed from the top to the end of the opening. Like Els, I sewed a diagonal line at the end rather than backstitching. Then I closed the zipper (just my approach), pinned it in place, opened the zipper, checked the left coil was on the fold, and basted it. I didn't backstitch when I started sewing the left side as I fully expected to have to rip it! Naturally, I was prepared so it went in just fine. I pulled the zipper pull up near the end of the opening (just a peek so it didn't get in the way of the foot). After sewing to the end of the opening, I pulled the top thread to the back and did a few back stitches by hand. I did not cut off the end of the zipper - doesn't seem to be a problem. If it is, I always can cut it off and bar tack the end. Sorry, I didn't take pictures as I was constructing this. I was focused and wasn't sure that it would work. Here's a picture of the inside of the finished zipper:
The skirt is finished now except for the final pressing. Once I do that, I'll post about the skirt construction.