I LOVE your rag quilt! I've actually gone off on a rag quilt tangent this past year, they seem to be more in demand than my traditional quilts, although I'm still doing those too...and are a much quicker project for gifting and destashing
I also prefer the cotton on both sides and flannel in the middle, must be the traditional quilter in me, lol!
Are you using a 1/2" seam allowance?