My swing over the winter has changed for the better, thanks swing coach! But now I'm wanting to get a few different weights for my C-16 driver, it came with a 10 gram neutral,and a 10 gram fade / draw weight. I'm wanting the lighter one,how may I attain one?They are not the same as the 917 weights, I have that driver also and they don't interchange. Any help will be greatly appreciated.