Apron edge to last pleat stitching question

[Barb T]

When I put in a hidden pleat, I baste the edge of it to the apron first, matching the stripes. Then I baste the edge of the deep pleat separately, and, last, tailor baste the whole thing. Try that and let me know how it goes.

Also - I assume you're working with wool tartan? If so, it's likely to look puckery until you've pressed it. I've made lots of kilts where I've agonized about whether the puckers will ever press out, and they've smooth out every time when I get to the steam pressing.