Okay, everything is good up to row 270, so it is safe to knit everything published here so far. There was an error from 273 onwards (due to a tiny innocent typo that snowballed and got completely out of hand) so I have removed the posts after 270 and will correct the error and re-post the correct pattern rows this week.
Big thanks to Termagent for spotting the error and helping me fix it–you’re a superstar!