I've read so many of you spray baste. I've done it with really small quilts, but now I'm getting ready to FMQ (teeth chattering) a quilt that is 55 x 55 inches. If I spray baste, is that ALL I need to do? Or should I still pin it too? I doubt it matters, but the back is also pieced (big pieces). I'd be using 505. Is that the right product?