If I'm hunting large flocks or migrants I dont change much because I use all my decoys for pulling power. I have to mix all decoy types to get a large spread. On sunny days I do worry about the sillys. I must say I have had great shoots with sillys in the spread even with the sun. If I had enough foots I would just use those. If there is little wind I really muffel my calling. Flutes sound very nice when there is no wind.To bad I forgot how to blow one. Pink faces and glasses will hurt you. Good Luck