Yet more progress (and I do realize most of you will never make a kilt, so you won't really understand all of this):
This morning, all bright-eyed and bushy-tailed, I was all ready to cut the fabric from the wrong side of the pleats (but only at the top), so I took my trusty pinking shears in hand and had at it.
But...
I discovered I had left the "buttonhole" opening for the under-apron strap in the *first* pleat from the top-apron edge rather then the second pleat, where it belongs. Luckily, I figured it out as I was cutting the excess fabric from the pleats, but *before* I cut the wrong one. WHEW!!! So I unpicked the 1.25" opening at the waist on pleat number two, and stitched shut the opening on pleat number one.
I found the 1.5" cotton twill at the Mill End Store today, so I have stabilized the back waist using the twill and buttonhole thread. Then I applied the hair canvas to the upper edge of both the under apron and the top apron and basted it in place, cut the piece of hair canvas for the pleat area and pin-basted it in place.
I'm taking pictures as I go.
Beverly, taking a break, I'll go at it fresh after dinner.