REDHEAD: I know exactly what you mean. There have been times when we've sat down to call, realized it was a bad set-up and just gotten up and left without calling. It's better than educating a coyote and not being able to call it later. I've also set-up and then changed either my location or the location of the caller. Again, a little more motion prior to starting to call is better than a bad set-up.
The first bobcat I killed was partially the result of modifying my set-up before beginning to call. As I sat down, I realized it wasn't goiung to be a great set-up. I only moved about ten feet to my right but when the bobcat got to my call, I only had to bring my rifle straight up and I was dead in line with the 'cat. I may have been able to get him from where I was at but it was satisfying to have it just right when he got there. A nice bobcat was the result.