Hey everybody, I am looking for a ball head for my Manfrotto 055xprob tripod. I am not sure if I should get the 496rc2 or the 498rc2. I am aware that the 498rc2 has a designated panning knob lock. Is that necessary? How would I be able to pan with the 496rc2? The 498rc2 costs almost twice as much as the 496rc2!