Hi. I have a set of 710mb's stock length, stock tv round grip at D2 on x100 shafts. I am looking to increase to D4. If they had been ordered at D4 would Titleist have used heavier heads or tip weighted plus 4g per club (assuming no other spec change) ? I am thinking about 714's but want to know if increased swingweight is achieved via heavier "custom" head or simply by tip weighting before considering further. Thanks.