If you could only have one machine, a treadle, to sew on which would you want? The 15-90 and 201-3 are apparently great machines for this but they're straight stitch only. Does that make a difference? Are the White Rotary machines as nice? I remember reading that the Pfaff 130 can be used on a treadle - does it require a special base or might it by chance fit a Singer base without significant modifications? Others that I'm missing?
Thanks in advance!