Girlfriend, you rock! Absolutely stellar! Why is it an issue of not being square? Leave it! Fantastic job, any body can make a square you made a stunning piece of art. I am in love with it. As a teacher of abstract art and traditional quilt skins ( a phrase I coined in 1976) I say quilt it or frame it. Machine quilting might be easier than hand quilting, a personal preference. Buttons would make it cute, matted on dark charcoal grey makes it striking, quilted with heavy variegated thread (w/o white) and a 3/8" binding in multi red tones, well beam me up Scotti!! I suggest you pin it to a wall that you can walk by a few times in day light and low light, look at it w/o any idea at all and let it speak to you. And, and if you want to sell it, I could be interested. It is beautiful and your workmanship is spot on. Your Pinwheel came out the way it wanted too, not square and don't cha love it.
Colleen in the Columbia river gorge 1/2 the year and in calgary the other 1/2.