Yeah elk nut, I have seen the ones you are talking about. Seems they would be pretty hard to get set up real fast. These caught my intrest cause they use a steel band around the edge so you could pop it up real quick. The area I hunt has too many bulls to count so finding a few isn' t a problem. I can actually afford to be a little picky. Getting them to take those few precious steps from around a tree is a problem. It truely is remarkable how a bull a couple of hundred yards away can pinpoint almost exactly where the calls were coming from. Just want something to keep them coming by for a shot. Thanks for the story and experiance.