thanks all for the kind comments
Mike I love your "War of the Worlds human fertilized red weed" analogy
Greg looking forward to how your version turns out - narroband as well? I wonder if there's any SII here to be had as well as the Ha/OIII?
And marc now you've mentioned bolognaise it reminds me of an old carpet cleaning add aroudn that artist "pro hart" (i think?) who paints a picture throwing bolagnase on a carpet, looks a bit like this eh ;-)