Well, I took the plunge. Loaded the top last night, and started quilting after dinner today. I combined a bunch of your ideas, and came up with tall curvy spikes in the rectangles, outlining the black bars and border squares, and spirals in the 16-patch blocks. I couldn't make the tree/vine and flowers work out in a way I liked, so I had to pass on that. I hope it looks good when I'm done.