DogHouseMom - how frustrating. But, like others have said, at least only 2 sets weren't sewn as opposed to the other 40.
With all the computerized stuff on my new sewing machine, it still doesn't tell me when I am low on bobbin thread. I've run out once in the middle of a seam already. And it was a nice straight seam, too. Are you listening Janome?
Thank you for the comments on the tree. I doubt I will be making it again, unless it becomes my signature piece for challenge fabric.