I still use mouth calls occasionally but mostly use my homebrew e-caller. I've explained on here how to make it before or you can go to predatormasters and there are all kinds of callers on there. If you can plug in two cords you can make your own, no wiring required. Why would you need to put a caller 100 yards away here? I can't see 100 yards most places and the places you can see you don't need to be walking 100 yards to put the caller out. I can put my caller over 100 feet away but rarely do. My caller uses an MP3 player, Azden mic remote and all the sounds I want downloaded from my CD's and from Western Rivers. Are Foxpro's nice? Sure but a Foxpro isn't going to kill you coyotes, don't care how many pictures are on their website or how many "prostaff" members toot their horn. Personally I can't afford one and even if I could I'd probably buy another AR instead. You are doing something right if you're getting birds in to your setup. Watch the wind and make sure you are hunting where coyotes are. I hunted a place today, made several stands and pretty much knew I wasn't going to have to worry about coyotes running in on me. Why? Never saw a track walking in. I did see cat tracks and fox tracks though so I adjusted my calling. For coyotes I usually stick with pup distress sounds or fox distress. For fox and cat I use a bird squealer the majority of the time. Stick with it. The more stands you make the more you will learn and the more you learn the more coyotes you will take.