My machine also has a walking foot sort of built in, so I can use my SID foot at the same time. However, I think if I had to choose, I would choose the SID foot. (I think that is what a stitching foot is? It has a guide that you aim for the seam?) I can SID very easily with that foot.
I agree with Irish Rose that you don't need to add any stitching to your quilt. What you have done should work very well for you.
I may not be expert enough to offer a real experienced opinion, and I am curious to hear what others say.
At any rate, welcome from Texas. This is a great place for a beginning quilter to be. I have been quilting a little over 2 years, and I have always had all my questions answered easily here.
Dina