What shaft does your Sumo currently have in it. The stock Diamana shaft has around 4 to 4.5 degrees of torque and weighs approx 65gms with a variable bend point depending on the flex. Here is the link to the NikeGolf website.
https://www.nike.com/nikegolf/index....esrc=uslanding
Click on Products near the top left and choose Drivers. Pick your club from the list, then go to the specifications page for the Sumo, there is a tab that says Shaft/Grip. The full specs of the shaft are listed there.
Is there something that doesn't seem right witht he current shaft? List some info like ball flight and trajectory and what you want to change and I can point you towards some shafts that might give you what you're looking for.
BT