Gardnergal - that is wonderful! I have four blocks sewn together - LOL - I plan to do several a day, with all the other stuff I'm working on!
I really don't worry too much about everything lining up, and yes, after doing several of her quilts, I am much better at being more accurate! I find that once the quilt is quilted no one but you will even notice what is not exactly correct. People see the quilt as a whole, and do not look at all the points and squares matching exactly. They would not even know to look for something like that. I think we are too critical with our own work sometimes! Just enjoy the process and beauty of what you do, time is too short to stress over it!