I am 5'7" on a good day! I have been considering cutting down my driver. So, I just took my cobra Bio cell driver and Bio Cell three wood to the range.
I put the three wood shaft into the driver (43.5 shaft) and hit some balls. I was amazed at how far I was still hitting the ball and much tighter dispersion.
Not sure what that made the swing weight, though it did not feel too bad. I also don't think I would go any shorter than 44 inches. But this proved to me that I definitely need to cut my driver shaft down.