All I ever use to do framing are screws and drill drivers. They are more forgiving when you decide to change your mind. I've built many project just with a older 9.6 so the EX is more than enough. With my newer 18v I can drive a 3 1/2 screw straight through a standard 2x4, the long way.
Just a word of caution, the torque on your wrists may still be enough to flare up the CT, these big drills are heavy and they can still twist the wrists significantly. If your CT is severe, you may want to go ther nailgun route for this project.