I am fortunate to have several bolts of 100% high quality cotton batting for quilting recently gifted to me. They are all the thin - I would go as far as to say the thinnest - batting you can buy. The brands are Warm & Natural and others comparable to this brand. I want to make a quilt or two a little heavier and a little thicker. Can I put two layers of batting in the quilt? It will be quilted on a longarm. Any immediate or long term issues? Has anyone ever done this? Thanks for any advice.