Cobbled Streets Shawl

This Cobbled Streets Shawl is a great exercise in making different knit/purl patterns in a single project.    I'm already on the 7th pattern of 14 stitch patterns, and row 100 of 200 rows.   I bought this single skein of local wool in Estonia this summer.   I've been itching to use it.   I know it's not enough for the whole shawl, and to finish my project, I intend to use a ball of fine alpaca from my stash.  But darn, I wished I had bought two skeins of this Estonia yarn.   My big dilemma now is  ...  do I use the alpaca in the center of the shawl like it was intentional, or on the end.   Hmm... I'll have to give it some thought.