I happen to come by an used 26oz Nanotek. I also have a 27oz. Yesterday, I was hitting some 52 300’s off a tee and the sound of the 26 is much different than the 27. To those that know, Nanotek’s have a distinct “penk” sound when hit. The 26 though has a familiar hollow “ping” Easton-like sound to it. Is this normal?