Thanks Tom!
I've made maybe 12 of these shades and it gets easier each time. The first one was just a top and bottom square, joined by angled corners.
I didn't really like the shape so much then I read the article and saw the plans. After a few of those, I figured out about some dress-up that came with the cuts, easy to add, no real extra work.
With the jigs, cutting really sped up and I figured out ways to push the inevitable errors out to the end where I can do some cut-fit-recut type work to get it all done.