If the shapes are odd you will need to do it free motion or go very slowly to go around curves and such. I have done it on the long arm and used a normal stitch size. If you do it on your domestic you may wish to increase your stitch size a bit but I would not go as large as basting. Because you are using water soluble thread it really doesn't matter what stitch size you use as the thread will wash away. Personally, I think a smaller stitch help when cutting away the batting. JMHO