I have a Bernina Virtuoso 153 and a 155, a 1006 school model and an 803 or maybe an 830? I can’t find the serpentine stitch on the Virtuoso but the dealer says it’s there. I really wish I could find it. I used it on an old machine and liked it instead of sitd. I don’t use the other stitches anymore, but maybe I will on some of the small charity quilts I’ve lately made. I used to use a stitch that had a heart in it.