Here's the deal. Once I treadled the 221 I started looking around at other machines that "can't be treadled". There are two machine in particular I've been looking to show that anything can be treadled. The Singer 500A and the other was The Elna Supermatic (the green one). I've had the repainted 500A sitting on the side for a bit. I haven't done it yet because I'm planning on that machine being my zigzagger at Philmont over the summer. So a Supermatic would be first. I wiffed on the green, but came up with this off goodwill instead.