I feel your pain as I am know by a couple of my quilting buddies as pretty imprecise. I own that. I'm not aiming for entries into competitive quilt shows, hope to get something into one of my guilds at least. And you've gotten great advice for lots of improvements--which I've incorporated and found improvement. But I quilt as a way to create and love to sew. I quilt for others and can tell you that there are many, many quilters that are still improving than there are those that have excellent seams, pressed the "right" way, etc. But each quilt has their own character, which is what I love about quilting.