I like:

Knight & Hale #143

MADD high-frequency (any)

Primos True Double II, but NOT the new Boss Hogg!! Just got it, think it is "weak" or "lame", too much "undercarry".

I'll bet I've tried at least 100 different diaphragms over the years, and most of them sound the same, to me. I like the K&H #143 because it gives a second tone/pitch and I can get a wide range of tonal variety from it, I like the MADD high-frequencies because they are higher pitched, which sounds (to me) more like all the hens I hear in the woods. I like the Primos II because it is sooooo easy, a good all-round call.
I tried the trough-tones (tone-troughs??) and Primos palate dealie, but they add nothing/are unnecessary, to me (but I acknowledge they may be really great for others).

I have some others in my collection I use for special purposes, like I have a call I use for nasally soft tree yelps, a different call I use for kee kees & kee kee runs (which is a very tight single reed) and a Pittman (rubber, not latex??) I occasionally use for cutting, but I don't know the call #s or even, for some of them, the manufacturer, any more.

I HAVE NOT experienced significant variation from call to call within a particular item. In other words, ALL the K & H #143s I've purchased sound VERY MUCH alike, etc.

My question to you guys:

How many of you can make your diaphragm sound like different turkeys, based on where you put it/place your tongue/which side of the reed(s) (center/left/right, not up or down) you use?? I only became aware you could do that 2-3, maybe 4 years ago. I like it!!!

Only (about) 70 days till turkey time!!!