my pop taught me how to use a diaphram call when i was 12, over the last 20 years i have tried many different types and manufactures of turkey calls. my call of choice in the fall and spring is the doube reed diaphram and the best one that i have found is the tuscorora legend. i have been reading and purchasing materials to make them myself, i have not made one yet but hope to soon.
With the double reed you can cut, kee kee, pur, yelp...etc. i have not been able to produce a realistic gobble sound with the diaphram, but am working on it.