Pitch Gauge 450 Helicopter Gaui or similar

thingiverse

This versatile tool is perfect for setting up an RC helicopter, especially those in the 450-size class or larger, as it can be easily adapted to fit any model. It also works seamlessly with a wide range of smartphones, from small screens to larger ones measuring up to 5.5 inches. In fact, users have successfully paired this device with devices like the OnePlus 3T and Moto X (with its smaller 4.4-inch screen). What's more, it comes with a free app that allows you to measure levels with precision.