Here’s a great wireless follow focus system that we did a review and tested on tripod and on a gimbal. We surely recommend you to consider this,

The digital wireless lens control provides the ability to remotely control when used on products such as jibs, cranes, dollies, gimbals, steadicams and drones. When the camera is crowded with crew and accessories, the wireless control allows the focus pullers to precisely control the focus, iris, or zoom remotely. The lens driver quickly mounts on either 15mm or 19mm rods. This system is compatible with wide varsity of cameras and lenses such as: Alexa, ARRI, RED, Sony, Canon, Nikon and Panasonic.

For more information about the Came-TV Wireless Follow Focus System, please visit http://www.came-tv.com/cametv-wireless-follow-focus-controller-motor-inside-receiver-p-660.html