According to both Harriett Hargrave and Diane Gaudynski you should SID before doing FMQ motifs to stablize the quilt. SID all over first and then go back to FMQ decorative motifs also affords you the opportunity to remove many of your basting pins and reducing the weight of the quilt. Try to see if you can't get your hands on Harriet Hargrave's "Heirloom Machine Quilting" book or Diane Gaudynski's book "Guide to Machine Quilting". Both books are written for the domestic home machine quilter and full of helpful hints and techniques and explanations as to why you should do one thing over another.
Your quilt is lovely!