It's not 'selfless', Matakari - I'd like advanced cryptics like this one to reach as wide an audience as possible, the more demand there is, the more puzzles we're likely to get (and the more people we'll have setting them). I found it a struggle getting started before online help became available but it quickly became apparent that some people 'in the know' wanted to limit its appeal (and I think that creates a degree of antagonism that we should all try to minimise).
If 'teachers teach and doers do', I'd call myself a 'doer', what about you, Matakari?