Would be really useful to setup the focal points (at least 2 to start with) and once video is recording be able to have the camera go through the motion.
Trying to think of the best way to keep hands off camera for focus pulls. Any chance to have the rack begin on something like covering the LCD sensor? This way you can have the camera sit on the tripod, and when the right moment comes along during shooting you can easily move your thumb over the sensor to begin the pull.
Ideally I would love to have a follow focus attachment, but this function would actually allow for much more accurate pull I think?