well i stumbled into this in youtube. kamui tpo7s nitrogen filled driver. suppose to have filled the head with nitrogen gas and made the face thinner which is suppose to generate a greater trampoline effect. think its gimmicky? i know powerbuilt released a nitrogen driver years ago. never tried it though. anyone have more info? il probably try it because the regular kamui tpo7s is one of my favorite drivers ever. hopefully this can finally kick out my yamaha 405d