sounds to me like the voice of experience MO.

I should also add in number 2, 25-30 mins is longer than I would of "worked" him as well. That's a lot of calling to go that long with a bird strutting 60-80 out and not moving to you. Even if you're just clucking and purring occasionally. I'd have to wonder if he sees hens in the feild that you don't see if this happens. Darn hens eh! Always messing with us.