I thought of one more question for all you clever minds. The belt on this one is external, and I wondered if it would be possible to operate it from a treadle base. If so, I have to say it never occurred to me that a zigzag/cam machine could be run that way, but I don't really know why not. I can't carry this thing, and I won't ask my DH because he pulled a hamstring in December. I have a Singer 66 treadle, but it's upstairs and the "new" machine is down and will stay there. So this is an academic question. Just curious.