I understand how to sandwich a quilt and do all that. I use the double bias strips too. What I was wondering about is the technique of quilting a section or row or block singly at a time, and attaching them as you go instead of sandwiching your quilt then having a big piece of work to put through the machine as you are actually quilting it together. I just can't figure how you attach block or section to section without having a big seam showing either on the front or back. I don't know I have a hard time visualizing....lol. Maybe this can't be done I don't know.