I just started getting into calling specks last year. I love it now. As far as hand placement goes, I just grab it like I would a short reed goose call.I use a foiles carnage collector with the new foiles speck guts in it. It's super easy to blow. I usually blow it one handed. You can get two different pitches from just using two different words. Ha-ha..Hee-hee for ex. To get those same notes to a higher register, all I have to do is raise my middle finger not even an 1/8 of an inch. If I want to take those notes lower, I just close my hand a little tighter on the call. To get the murmur, I have to use both hands to muffle it down a bit as my call is very high pitched. I usually try and talk back to one particular bird, by doing what it does. If that doesn't work, and I know to some, this sounds off the wall, I start with a hee-hee, then followed by single hee's, maybe 9-12 notes, and as I go down the line I start to slow it up and space them out till it sounds like just a regular goose cluck, then I might do the same thing again. I've noticed it seems to work on them like a comeback call does on a canadian. I'm not an expert, but it does work. Last year was my first year hunting them, and using just 11 feeder ghg speck decoys, along a dozen canadian decoys, we killed over 25 specks. Hopefully it wasn't beginners luck! They do like to decoy. One thing I did notice, they work a lot like ducks. They tend to circle quite a bit before they commit. once you get their attention, just try calling them on the corners, and once they get below 50 yds, I tried to keep the calling to a minimum or just stop calling altogether. I hope this doesn't come off as seeming like I am a know it all, but that is what worked for me. Just try different things to see what works, thats all i can tell ya! Good luck!