Don't take me so seriously, Josep. Did you get a listen to Jupiter?

Olddude - many thanks, old bean. I have to confess I only have a dim understanding of the mathematical side compared with that which you appear to have, although I find it fascinating. Misspent youth - joined rock band instead of getting educated, though it was still an education of sorts.. Yes, I did have a mess about with attractors ('strange' attractors?) - weird and wonderful..