I am a little over halfway with adding the extra batting. Since this has been such a time-heavy project ALREADY, I want to do this just right. The top and backing fabrics are so thin...I didn't want to chance a bumpy seam being highlighted and ruining the look of the quilt. So I am meticulously hand stitching the thin batting (strong resemblance to cobwebs) so that there is no bump. I find I have to take frequent breaks as this is very hard on my shoulder and elbow for some reason.
I am doing about 3 inches of stitches (about 3/8" apart) then tying a knot, just for some added stability.