Finally struggled to the end. Without the hints on this forum I’d still be staring at a half-finished grid, so many thanks.
I started to enjoy it by the end, encouraged by the fact that I wasn’t the only one struggling :)
Reminds me of when I worked for Acorn Computers in Cambridge in the early 90s when my boss used to describe some problems as “solvable, but you have to turn your brain inside out” :)
This forum is such a help!