Driver, Cut Shaft vs 3 Wood Shaft?

OK thanks, so my thoughts are to measure the balance point of my driver as it is, remove around 1 1/2 inches from the butt fit a new grip then add weight to the head until the balance point is at the same point on the shaft. Does that sound roughly correct way to get the swing weight similar or am I over simplifying this? Bearing in mind I'm not a fantastic golfer and I don't think I play enough that I would notice small differences in clubs.