Convert to treadle easily
 

Article is not necessarily just for Kenmores. Good pics and explanation. http://mushycat.com/wiki/index.php?n...moreConversion

The above mentions a vegan belt? Also explains why she likes its performance, http://mushycat.com/wiki/index.php?n=Treadles.VeganBelt

That's great!
It wouln't work on my Kenmore though, because the table of the machine extends too far to the right, ie. it blocks the path where the belt would have to pass through.
I bet it would work on about 80% of vintage machines though!