I have the Kwik Bind System and it does sew the front and back at the same time and miters the corners it takes a lot of practice which I haven't had time to do, set up takes a lot of time, and I did get that done. I did do a small peice and it came out good corners are nice to. But I can see where one would have to practice. It will fit any machine as it comes with all kinds of adapters for slant,high,low shanks. I hope to have time this spring to work with mine some more. It will even fit on my 15-91 singer. Which is the machine I want to use it on most.