This is a simple way to dampen those high frequency vibrations resonating through your carbon frame and confusing your flight controller. Simply stick these squishy things between your frame and your motors. Tighten screws like normal.
Item Name: Motor Anti-vibration Pad
Usage: for 1306, 1407 etc 13XX Series motor or 14xx series
Material: Soft Silicon
Colour: Red and Transparent.
12 * Motor Anti-vibration Pad (3 colours)