I cannot remember seeing anywhere about speed on the tab control other than pressing the tab key many time to increase the speed. If you start the tab control you can vary the speed of the Typhoon using the Hare/Tortoise control on the right. It is much easier than keep on pressing the tab key I find. It works in all directions. Also I did a comparison between shooting in 4K and in 1920 HD. Both converted to 1920 at 9M for uploading to Vimeo. Subjectively I see very little difference.
