JMO but anytime you put a driver head on a 43.50" shaft and you have 90 mph and below. The results will be very much the same compared to a 45" playing length driver as distance gained thru longer playing length will be not as much as a player with 100 mph and above which will gain more.
43.50" you will hit the center impact better and yield better accuracy and much the same as a 45" hit off center. Now if you can hit that 45" center impact at 90 mph you might gain a few yards at 100+ mph you will of course gain a lot more.
It's more about the playing length with correct shaft weight/flex/face angle than head.
