This sounds really fascinating to me. Have you considered the technique used by this quilter?
http://www.quiltsbycts.com/quilts/wool_quilts.htm
She fulls the wool so it doesn't fray or ravel, cuts the patchwork pieces to **finished size**, abuts the raw edges (no seam allowance), and joins them with the sewing machine (decorative stitch or zigzag). I wish she showed more examples of her quilts.