One suggestion I have for you is before you invest money into a custom tube call, you may want to try a cheaper version like the Primos tube call to see if you like the sound and are able to create the specific calls that a tube call can make. Then if you are comfortable with the sound and the progress you have made, then invest in a custom type tube call. Tube calls have a unique sound and they make great clucks, jake gobbles and all the other calls that a diaphram type call can make. Not sure if this helps you but this is my suggestion to you. Good luck and good hunting!