i was teaching my friend to use his box call..he brings me over a lynch fool proof..i am a decint caller and been calling for 5 years now...i couldnt make that thing sound like a turkey...it wasnt my call so i didnt play with the screw..i did sand it and chalk it..it was pretty bad...way to high pitched for me...sounded like crap when it did come close to a turkey sound....i never tried the primos...i really dont touch production box calls..mine was handmade..i cant remember the wood i think its cedar...it has a great sound and never gave me problems and it cost me a whole 20 bucks!...i think when buying box calls its worht hte extra money to get something that really sings instead of something that will barely make a turkey sound..i am lucky i have a shop out the road that lets me play with any call i want and they sell alot of hand made stuff that really sings...i would rather have something like that any day box call wise...just my 2 cents....