My computerized Janome 4800 has a built-in scallop stitch that has stitches that go from narrow to wide and narrow again along the curve. Another scallop stitch has evenly wide stitches throughout the curve. It also can expand some of the stitches up to five times their length with the same nice stitching–the stitch pattern (the curve) just gets longer. Maybe your Elna has a similar stitch or feature you haven’t discovered yet. I’ve read my manual four times and I’m still learning new things about my Janome. I have an old White that has wonderful manual controls, but I’m sure I’d want my Janome to do the scallops so that they’ll be consistent. Tell me why you want to do yours manually–maybe there’s something I didn’t think about that I’d rather do manually myself. Every trick and tip is useful. Thanks!