Isn't it thrilling when things actually work out the way you planned? Perhaps it's the rarity factor.
Anyway, the Colorblock Shawl cooperated in keeping a solid 25" back length after being released from its blocking pins, so I picked up 3 stitches at each end and made two 12" i-cord ties. As usual, there was just enough yarn. I had a 2-gram squib held in reserve in case the bindoff gave me grief. But it didn't. And I unraveled a 3-gram swatch that had been knit by the original owner of the yarn.