I disagree with you on a couple of points, bobbycollins - I do want the thread, very occasionally, to give answers if/when the same question is repeated and hints haven't helped. As for the title, 'Answers Only' this keeps the thread uncluttered and businesslike (introspection and opinion is what the other thread is for, I think).
The preamble to this puzzle could have been clearer/more helpful and that would have removed much of its difficulty. I'm sure I'm not the only solver to quickly finish it and then go back to work out how the preamble had 'helped' me get there (apologies for this little digression).