Glad I could help Retrogirl. Its a very good idea to do a practice run first. I suggest the same thing to my students. Just remember when you do start on your full size quilt, to open out your stitch length a little bit more than you would when you sew regularly to accomodate the bulk under the foot. For example, I usually sew regularly around a 2.5 - 3 length. When I quilt I go to 3-3.5.
You are going to have to help guide your quilt through with your hands, but remember not to pull it through or you will get skipped and long stitches. Just take your time with it, relax your neck and shoulders and just have FUN!!!
Cheers