Using s2kpsso for double decrease.
10 rpts - 34gm left.
Going to try for 12 full rpts, then rows 1-9 (so half a rpt, instead of 1-19).
Oh no no, left it at 10 rpts and rows 1-9 bc couldn’t bear to use third skein which was completely difft dyelot.

24 mar 19 - done
23 mar - rpt 10 complete. Thinking to do 11 full rpts and rows 1-19 of rpt 12. 34gm left so have used equivalent of 2 skeins.
20 mar - finally made it through that first skein at what is pretty much precisely the halfway mark of the shawl (halfway though rpt 8). Taking into acct though that there was that initial third of a ball too. So I don’t think one more skein will finish it, but have an extra skein after that to go.
18 mar - rpt 6 done.
17 mar - rpt 5 done, so almost halfway there in length but only a quarter in size.
16 mar - 6 rows of rpt 5
15 mar - four rpts done
13 mar 19 - three rpts of chart B done