Well, I cut very carefully. And went to pin it together, only to realize that the fabric must have stretched at some point. There was nothing I could do to get the horizontal stripes to line up perfectly. But. half an hour later, I did in fact have a passable side seam. And I am fairly happy with the skirt overall.
I think perhaps the pleats could use an ironing. And I wish there was a little bit more fullness to the skirt.
Final Notes: Don't expect to see a lot more plaids around here... I like the look, but half an hour for one side seam just isn't worth it!