I want a new Phantom 5.2, however I can't find information on head weights. I have done a putter fitting, and know that I need 350 grams on a 34.5" length putter. I would have to specify either the 10 gram or 15 gram weights, but don't know which would give me the 350 gram head weight I'm looking for. I THINK I've seen that the older ones had 350 gram heads in the 35" and 360 gram in the 34", but not sure if this is still accurate.