Hi K3n - I think I would bore everyone silly going through all 39 of the others. I do have one treadle here that actually does a zig zag stitch. Made that way as an original. You can in fact convert to treadle lots of fifties machines that originally had engines so theoretically you could treadle some of the ones with embroidery discs if you wanted to be real fancy. I probably equate treadling to being like hand quilting, you drop the pace back and relax.