Using a rack is hard for me. I can't get the sound I like to play because I can't move the harp. I suppose if I keep trying I could get it, and that's what I've been working on. Another thing I have noticed and not checked into, is when harp players hook up to their own amps and some have these little vibration boxes or what ever they are to produce different sounds, echos, etc. I am interested in knowing what it is they use on stage. I have only played through the mike. Rustic