Loving that you all are as obsessed with the insides as the outsides like me.
I finish using a triple stitch zig-zag, although I think it actually makes 4 stitches 2 for the zig and 2 for the zag! I was using the zig zag, with the point hitting the edge. It was causing the seams to bunch and curl. While they wouldn’t fray, they didn’t lie flat or look nice. I brought in a dress to find buttons at my local shop. The proprietor, of course, had to inspect the dress. (Don’t you just hate it when they do that… I feel like I am suddenly the world’s worst sewist.) She noticed the seam finishing and said, “next time, try the triple stitch zig zag. Catch the edge like you do to keep it bound, but the triple stitch will keep it flat.”
Stitch #8 on my Janome Magnolia has now been cast aside for stitch #9! That triple stitch zig zag is the real deal. What it does is break up the zig zag into several stitches instead of zig out, zag in.