I use Warm & Natural in mine. Then again, that's what I use in all my quilts. FWIW, since I'm not a MQ'er normally I simply do straight line diagonal quilting about every 3" apart on my QFK quilts and when I dropped the first one off to them since they are not far from me, they were thrilled with the quilt and considered that amount of quilting to be 'heavily' quilted in their opinion.