I recently ordered a Fubuki 73 tour stiff from through my local dealer to replace the made for Ahina 72 that came in my 910 D2. The head now feels very light. Did this change the swing weight significantly? With the Fubuki Tour 73 what would the swing weight be with the 7 gram, 9 gram and 12 gram weights respectively? What was the swing weight with the stock Ahina?