i duck hunted one time with a guy up in Knox City, he had a RNT with echo guts in it. it sounded amazing!
i use a cheap, orange akrylic, ECHO call from wal-mart. i like it ok, has enough to reach 'em and soft enough to talk dirty to 'em.
you couldn't pry my 'ol Duck Commander mallard drake whistle from my cold dead hands!!! not as versitle as a 6 in 1, but charms them every time!
if i could make a scented candle, i'd make call it... gunpowder in the sunrise! or wet dog, swamp mud and gun smoke!