Don't feel bad because I have the exact same problem. The quilts I made years ago were perfect, now I can't sew a straight seam and I have a 1/4 foot. I too have the Go and, if you have the strip set, alternate the direction when sewing strips together. I was having the same problem with my pieces coming out "wonky" when I'd sew them together. Then I tried sewing one piece on, turning the quilt to the bottom and starting there to sew the second. Not sure I make it clear but just alternate the directions you sew each together. If that doesn't work then don't give up. A finished quilt of any kind is a wonderful thing.