What is the standard weight on the 910F and what is the purpose of the different weights in the weight kit, how will a different weight impact my ball flight?
For adjusting swing weight. Shaft construction, shaft length, and grip selection will vary the swing weight given a fixed weight of a club head. If you wanted to go with a Winn-Light grip and keep the swing weight the same, you'd need to put in a lighter weight. Most of the clubs have a D2-D3 swing weight. You can also use a heavier bezel if you like to feel the head more. Some of the UL drivers have shaved more weight off of the grips and shafts and end up with a D7-D9 swing weight. Which is perplexing as the population most likely to benefit from an UL is also the most likely to not be able to well control a swing weight that high.