I have been quilting--self-taught--since the '70's, all by hand. As I get older, the eyes growing weaker, I will be forced to start doing machine quilting. I have tried to practice on a 20" square sandwich that is pin-basted and am having a terrible time! I have a walking-foot on my machine that I have tried. I have also dropped the feed-dogs and used the darning foot (circle thingy with hole in the middle where needle goes up and down. I simply can't get the hang of it. Can you help me with some tips and tricks? Thanks so much!