Spent some time last night tuning a long box I just built. I noticed that when I ran it without attaching the lid with the screw (securing the paddle with my left hand and holding the box at the same time) I was actually getting a great sound. Much different than it sounds with screw holding down the lid. I was able to manipulate the amount of pressure in a certain way that's not possible with a screw. Call seemed to be louder/crisper and i was able to get a more thorough and longer drawn out yelp. Cuts sounded a lot better as well. If I could get those sounds while actually having the screw attached I'd be pretty satisfied with my call making. I guess that's just part of it though! If anyone knows what I'm talking about please feel free to chime in!