Don't forget a shaft can play very different dependent on the temperatures and where they are stored when you don't use them. Try to avoid keeping them in the boot of the car in the depths of winter or they might feel like an X flex when you get them to the course.
My first post on this forum !!!! I have 1150's (stiff) in my Mp68's. They are a very smooth shaft, but feels a little softer than the flex indicates. Definitely more suited to a good smooth tempo swing than an explosive one!!!!