Nigel, Thanks so much for the comment. I couldn't agree more with you on always having a backup call. No matter what the situation it's always a good idea. Also, I hadn't thought of using them as a teaching/practicing tool but that's a very good point.
You also peaked my curiosity on the turkey calls. I am novice at best when it comes to turkeys, so I would be interested to here what you are using, such as box calls or mouth diaphragms. I often use a mouth diaphragm turkey call but not for turkey hunting. I would love to hear your opinion.