Does anyone know what the M1 driver (460) head weigh? Can someone weight just the head and let me know what you find? I've looked all over and can't find a spec. I ask because I know they built the crown with carbon fiber so they could add weight to the bottom but I don't like lite driver heads. Also the shafts that Taylormade offers all seem to be on the heavy side and I'm trying to narrow down a handful of shafts (and shaft weights) that might work well for me. Thanks in advance!