amount to adjust a seam size it is within contemplation for outside foot 179 to be replaceable with alternative outside feet which are either wider or more narrow than illustrated wide feet 179 may be more appropriate when sewing wide seams and narrow feet 179 may be more appropriate when sewing narrow seams a stop mechanism such as screw 197 may be arranged to limit a transverse displacement of outside foot 179 in an inside direction as illustrated end 199 of screw 197 is spaced apart from inside surface 201 of outside foot 179 stop mechanism 197 desirably is adjustable to provide a range in maximum inward displacement values for outside foot 179 0023 fig5 illustrates certain distance relationships in one embodiment of the invention when setting up a sewing machine to sew a seam edge guide 102 is positioned at a distance d1 from a centerline of needle 185 d1 therefore corresponds to the seam size outside foot 179 has a width d2 leaving a space between it and walking foot 183 indicated by d3 stop 197 is set to limit displacement of outside foot 179 by a distance less than d3 to prevent contact between outside foot 179 and walking foot 183 typically stop 197 is set to limit an inward displacement of edge guide 102 to a minimum value determined to be sufficient to make a seam size correction u201c steering u201d the material back into seam size compliance such u201c steering.