Sampling

Trying to get different greynesses with different weights of thread and density (and type) of stitch -And the sample swatch of machine and hand quilting, on various recycled linens, that I'll add the sample stitches to, in those moments when a bit of hand-stitching would soothe the soul -
Having got this far, though, I've had another idea - different, maybe better? (This is for CQ's "Breakthrough" challenge - deadline November. Better get cracking ...)