Definitely not a SID expert, but find that any sewing machine quilting (don't have a long arm :-< ) is made 100% easier/better by using my Machinger gloves. Plus, they save hand fatigue!
Until you get a SID foot, might try a narrow zipper foot - the kind that rides on the outside of the zipper - that will give you good visibity for your seam and let the foot ride to one side of your seam. Good luck, have fun!
Love this forum!!