I am interested in the Nodal Ninja 3 MKII w/Rotator R-D12. I‚Äôve never used any equipment like this before and am trying to understand the degree stops and how they work. For example if the 20 degree setting is chosen then there would be 18 stops. Are these physical stops? Does one feel a click as the camera is rotated? If time is an issue, how long would it take to move between stops and take the individual pictures? How exactly does this system work?