It's been almost a week and I have 6.5 repeats of the pattern row done on the Sumac Shawl. A couple times I had to tink it back because I put in an additional yo. Once I dropped a yo and couldn't fix it without tinking it. At least I know I can get yo happy and put in too many. I don't think I'll have any trouble finishing this in time for Christmas. I think I can definitely say working on increasingly more difficult shawls is a good way to learn how to knit lace shawls.