I also use scant 1/8" seams for my teeny tiny one inch quilt blocks. I have 1/4" special feet for both my high end Pfaff and Bernina machines. But I always use my Pfaff with its regular foot and the "needle move" feature to move the needle to the right to get it to the exact spot I need for the scant 1/4 or 1/8 seam allowances. And if I am sewing a "large" block, I often start in the middle - sew one end and then go back and sew the beginning section of the block. For me it helps the distortion of the seam allowance because I am clumsy with large blocks. Most quilters don't have this issue.