Changeling,
As a call maker my self... there are good things about alot of calls and there are bad things about alot of differant calls... If you want a call to make noise... They all should...... If not take them back... But there are going to be things like sound quality, consistancy, and acustical mechanics that will change from call to call. You can take a broom stick and drill a hole in it, put a reed in, and you have a call... It probably wont sound that good, but it is a call...You will have to test alot of calls to find what you like...
But, I think that Coyote#68 shot this one in the Heart about the coyote being willing, Your set-up, and scouting, hunting pressure, and your approach, I think that alot of guys get busted going in, a coyote will put himself in a good vantage point before he lays down for a nap... and I dont think they sleep as well as the typical black lab... They havent been persecuted as long as they have, and surviving with out being smart....
Thats just my two cents...
Mike
www.purepredator.com
Pure Predator Custom Calls