I studied on it a min and got one of those mini lathes (12") off Amazon. I've got a drill press so I'm gonna turn a few. I made one back 30 years ago when I had a little lathe. I think I'll find a rot cleaned cedar with a buncha knots and try that, I'll post pics.I've never used a trumpet call but, have made several wingbones and called in several birds with them. If I had a wood lathe, I would make one and try it.