A couple of fellas over on another forum debated that same question last year, and I had a good friend made me one real similar like, by using a soda can bottom as the bottom dome part, and its a singer!! You can get loud with it by using a carbon striker ( hollow arrow shaft ) or get real small and quiet with it by using a wooden striker, this one was slate over slate, and I'm gonna use it some this spring, althogh I dont want to dent it up, its a real keepsake cause it came from him, and it LOOKS real fine !!