I'm working on a double sided quilt as well and what I've done so far is just make the blocks into rows and I'm planning to place the first row on the full piece of batting and pin the heck out of them and SID between the blocks to anchor them and then add another row and stitch that row down across the quilt and then SID between each block then repeat until it's all done. I don't know if this makes any sense at all or if it will even work. That is next weeks project while I'm on vacation. Good luck!