[EdZ]

For any given person/swing there should be a 'sweet spot' of mass vs. speed. I personally love the feel of a heavier club. I keep my swingweights up around D4-D6 - perhaps a 'feel vs real' issue, but it really helps me ensure that I am truly 'swinging'. The other advantage is that the more mass, the harder it is to be 'off plane'.

While there is certainly an issue with having clubs that are 'too heavy', I think a big reason that kids often have great swings is that the clubs are heavier for them. That really lets the swing happen.

I'd be curious to get input from those equiptment guru's out there on exactly how to find the best combination of mass vs speed vs shaft flex from a physics perspective.