Sorry for the awkward sounding post... new here...
OP - I know this is your thread, but why a box call? I'm not familiar with your region of the country, but everyone I know uses mouth calls and sometimes dekes... frees up their hands and what not...
I should preface this by saying that I don't claim to know much about hunting, but I can say that what I have done has been extremely successful where I was hunting. A box call, or any call for that matter did not figure into any of the turkeys that I harvested last year... but then I hunt turkey quite a bit different than most... I would love to discuss my methods with anyone interested, however I'm not sure it fits this thread, so PM me if you want to know more about it.