I went to a fitting with the Callaway club van yesterday and we figured out that the Diamana Whiteboard 73 S was the best shaft for my driver. Now I have heard before that you should try to use the same shaft in your woods as in your driver. I am curious to know if this is a rule of thumb or just hear say? Are there certain aspects that make that true / not true or is it strictly depend on how I swing my 3-wood compared to my driver?