We just go my son a new Allegiance. He is shooting 47#'s with a 24" draw and 24" Goldtip Entrada 600's with 85 grain point. We are having a hard time getting it tuned. The arrows are fishtailing. Do you think it is too stiff for his setup? He's shooting Blazer vanes with as much helical as I can get and using a Cobra Diamondback arrow rest. Any suggestions would be much appreciated