910D2

Just purchased my first Titleist driver(was playing a Burner). Found a new 910D2 (9.5) with a Diamana 65 stiff shaft. I'm hitting the ball great but will still have a slight fade at the end of the shot. I have not made an adjustment yet and I'm still playing at the standard setting. Is there a rule about changing the settings during a round?

Of course.  No adjustments during a competition round, just like putting with a 3W when you heave the putter into a pond.

Besides, I'm better off making any changes based on multiple experiences and not just the last shot.