I will join the majority. Go with the "floating" triangles. The fabrics you've used will "sell" the quilt. It looks good, decreases the risk of damage (or cutting blocks too small, one of my favorite tricks), and saves your valuable time for better things! My roomate and I discovered the razor blade method when she tried to learn free motion quilting on her quilt, instead of practicing first. The stitches were so tiny and clumped together she was ready to trash the quilt. Working together, one separating and one running the blade gave us three stabilizing hands and one steady cutting hand. No damage to fabric or hands and we saved the quilt!