Re Gary62's post about articulating, I watched one of Adam's new videos yesterday - the one on 'Sweet Harp', and noticed how to mimic the sound e.g. on the opening phrases, I had to stop doing articulations and concentrate on slurring the notes as much as possible.
I've spent so much time on blues harp getting articulations in (tonguing, slaps, pulls and all that stuff that makes up the amplified sound) that I'd forgotten to play the other way. Note to self to practice that.