I forgot to take a picture of the sweater prior to cutting it but you get the picture. I basically just cut out the back leaving a little room for a seam and the binding on the top for neck and binding along bottom.
I carefully cut out the lace using the cut out from the back as a pattern. Remember to leave some room for the seam. (fig. 2)
I pinned the lace cut out to the sweater matching up the corners and edges.
I used a serger to serge the seams. I find that it makes it easier, faster and a little more comfortable when wearing it.
Now you have a lovely and breezy little transition cardigan! Best part is that I only paid $2.99 for the chantilly lace and I was able to utilize something old!