I got the tail gunner. It was my second choice, as I didn't see the need for the extra flap, but it doesn't hurt either... It MIGHT actually be helping...
And all things being equal, I probably would have just got the basic cow-hide, but I was willing to pay the extra for horsehide if it meant I didn't have to wait for weeks and weeks... and the one in stock was horsehide, so I paid the extra money. Of course now that I have it in my hand, I DO really like the material. So I'm galad it worked out that way.
And, just to mention it... It took about 4 days for it to break in to the point where the fit is what I wanted. - Not bad, really.