I have been testing the prototype Energy series calls from Woodhaven set to come out next Spring. These things are very easy to run, the purrs, clucks, cutts, and cackles come very easy. You can tone them down nicely for the soft stuff and they will rip out the loud, aggressive stuff with ease.
I'm working on cleaning up the front end of my yelp like Scott demonstrates in his youtube video. After I work on this for a couple weeks I will post a youtube video of me running these calls.
Scott, thanks for letting me test them.