copyright is such a difficult thing to understand. my thought is that since you didn't use or buy a pattern - jan hardy miller's to be specfic - and made your own, i don't think copyright infringement comes into play. i make up my own patterns all the time, and i don't believe that my ideas are original, meaning that someone somewhere at some time has made a component that is in my original quilt. it seems to me that you had a skill that would allow you to look at a quilted piece and make something similar. you could do the same with my "original" quilt (see my avatar). although i am not a famous designer, i am a designer none-the-less. that said, do what you feel is necessary.