You sound like me - I can feel guilty about anything. And since you more than likely made some change to yours it really is no big deal. And like the others said you can get the same information from the library. I have bought numerous books and magazines and not made an item. But I have looked at other quilts on-line and at a store, said, "I can do that!" and gone home wrote a few notes down and made the quilt, using my fabric and any unique twist that may come to mind. I don't feel guilty about it. It's all part of the process. Quilters share ideas. I buy patterns I like and may make changes along the way. If the quilt police arrive at my door, I will let you know.