Haven't really tried using decoys much. There is a good artical in the bowhunters magazine, whitetail special 2007. The artical is called "Decoy Delemma" page 34, by Dana Coldren. He goes into pretty good detail on 3-d and 2-D decoys.Hehas been experimenting with all kinds and goes into pretty good detail of how it's worked for him. If you can get a copy and check it out may answer some of your questions. After reading it I may give it a try. Good luck!
Crutch