Recently on the Singer Featherweight site a member posted that she uses the zipper foot (the kind that has a moveable ankle on it) and lowers the pressure on the top and finds that stitching slowly she has more visibility and control for SID. I haven't tried it yet, but it is worth considering. When I start SID I think it's going along pretty good...but then I come to where my seams are pressed in the opposite direction... and I end up with a zig and a zag where I don't want them.