My buddy Jason can do all those voice calls as well. His gobbles dont sound near as good though. People that accomplish this amaze me. Dalton has it down pat.
Idk if you have thought of this yet, but there are actually voice calling competitions at NWTF events, he may be able to go somewhere up the ranks with practice.
I want to go turkey hunting with him now to see him work a bird...tell him I called him crazy for not trying it on real turks yet, that voice sounds better than any call!!!