Well done. I'm willing to field questions, & if I'm away, Les will probably pick up on it.
Next time I can post a harder one. Well, that's relative to the solver. Didn't want to spook anyone, but there hasn't been much response except for the hard-core.
Odd, since there was a flurry re the Atlantic.
I'll wait a bit because the next Joint Effort should be out soon, & then the Genius.