To each their own, but I wouldnt be to inclined to drill and tap a Cynergy for optics to hunt turkey. I personally dont see a need for optics to hunt turkey at all, but I guess I could see why one would use optics to hunt big game. If an Over/Under is your gun of choice and optics are important, then do as you see fit and dont worry about what others may think. But if you ever decide to sell the gun in the future, you'll hurt the resale value buy drilling and tapping