One side is now the desired length. Due to extra density of garment, it took 51 rows rather than the 20 it took the pattern author.
Bit early to tell at this stage, since sleeves obviously need lengthening, but is already quite heavy to wear, so here’s hoping.
Still unconvinced about use of self-striping yarn. Had to order another cake of yarn, which arrived today along with a whole lot of other balls, but that’s another story..