I made a miller's crossing quilt and found that even though the pinwheel points weren't perfect (and I tried! they got ripped out quite a few times) you're only going to tell if you look at it up close, but from far away (meaning across the room) you can't really notice, you're more drawn to the pattern then to how perfect they match up. So my advice is to get them as good as you can, and remember, it doesn't have to be perfect! there's no such thing no matter how hard we try!