So I have a question about my Q3T. What does the small dial on the larger dial do? From what I've read it's the tension control. But isn't that what the main large dial is for? What does the small dial do?
The small dial is to limit "how lose" you can turn it to be. So once you adjust the main knob to a point that you're comfortably lose, tighten the small dial. That sets the max "loseness" that the main knob can go. This helps so that you need not spend a long time to tighten the main knob.
So by right, the right way to use it should be that you only need to turn the main knob a small amount (1/4 - 1/2 turns) to tighten the ball head... haha, hope I explain well enough.. Kind of hard to explain