I agree with Gregg. A gobbling box has to have a certain sound. I never liked the lynches I ran and don't think they'd sound well. In a gobbling box I want a very deep call that I can get either clean or rasp out of. To get a good gobble I want very light lid pressure. I get both a better sound pitch and cadence that way. To get that light pressure I hold the box at probably a 45 degree angle vertically. Then I draw the lid across one rail to make the first note of the gobble, and then go back and forth across the rails to make the cadence of the gobble. I like to ease my pressure on the rails as I come to the end of the gobble to change the pitch and give it more of an "echo" type sound. Personally I don't see how putting rubber bands on a call could make a good gobble. To get a good sound to me takes a lot of practice and precision with changing pressure through the gobble. It can be learned easily though with a good call. I taught myself in a couple of weeks. And it sounds really good on a few of my boxes, but the same technique that sounds perfect on the right box sounds terrible on another. It is absolutely deadly in the field though if you can learn it. That's why I always keep my ear out for a good gobbling box sound file...