Most of the RC-Heli pilots use a pitch gauge to adjust several positions and throws on their helicopters. This tool isn't really easy to use and also not very prercise. With our V 5.0 Pro we have much more precise and easier ways to adjust these things.
To adjust the collective range do as follows:
Now give full collective and measure the distance between the blades. Type this value and the blade length into the pc software (Enter required after each input). The current collective throw will be displayed now.