G'day Bob,
          Thanks for the offer, I might come and invade you and pick your brains as well as your resources. I don't know what you call the business end of such an instrument, fipple or nipple or what, but Bruci's Idea of forming a metal head end seems to be the go. I couldn't get a plastic one to sound, whereas I could get a tone out of a reasonably thin walled piece of brass or aluminium. I'll give you a phone after the election if we don't run into each other before that. Good Health, Mate. Jack Halyard.