Originally Posted by
csharp
I use fuseable batting and the quilt is secured in the "sandwich" with stitch in the ditch down the center and machine stitched on the edge of the border all around the quilt. This is what I do on all my quilts before I start my fmq and I start usually in the middle and go outward when I have a plan in mind. Also stitched in the ditch across the center of the quilt. I have already trimmed off the excess backing.
Do talk with your long armer, but I would suggest you take out the quilting that is on the edges and also go ahead and add about a 4" strip on all the sides to the backing so that the long armer has something to attach the quilt to the frame. Of course, the LA could do all this for you--but you'd pay the extra--but do talk to your LA to get clear what is needed.