Good spring tension, thumb screws at both pivot points ensure good accuracy. Very easy to use and as an added touch has a 100mm scale on the top. Very useful for measuring flybar setup. A wee bit heavy but usable. The white inset on the markings was very bad and had to use a white marking tool to bring ... Read more
Easy to use. I use on my Blade 400 3d which has 325mm blades.
Slides on easily, and spring not to fierce.
Easy to read scale, and simple to align top edge with flybar for reference point.
Reasonably well constructed, and appears quite durable. None at this price. An essential piece of kit for RC helicopters.... Read more
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