Your using good quality fabrics. Your son will have this quilt for a long, long time. When he gets older, he will look at it and say my mom loved me so much that she made this quilt for me. He's not going to see a seam that isn't lined up, a color that doesn't match, a thread that you can see, a line that got quilted across or anything else that you find is 'imperfect'. You will always be perfect in his eyes. Like someone said, 'Don't sweat the small stuff'. This is for him. He will treasure it. I think it's beautiful just the way it is.