Your quilt came out beautiful. Love the colors. I had to press my seams open on my Hunter's Star for the same reason. It does help, but that won't help you now will it.
I wasn't all that impressed with the book, the pictures of the process sucked. The quilts were pretty in the book but I could have done without those and maybe a few more pictures of what I actually needed to know.
I guess I'm a video kid of a gal. Thank God for YouTube