My guild does a lot of charity quilts. We don't worry so much about the seams being even, etc. These are quilts for people who are mostly living in shelters so they are more concerned about size (overall) and warmth than the other things you mention. Keep in mind, these people are not looking at a quilt with a discerning eye. They are just looking for something warm to cover up with. Some of our squares are cut really small and some too large. We just work it out. Good luck to you.