Holybro FETtec Mini AIO 15A Drone Electronics while the rubber tread resist

while the rubber tread resist slip and wear

and you're probably expecting this frame to be considerably heavier than the fixed arm version (the Marmotte)

Carbon rod 70mm & 140mm *1

making sure they're compatible

Holybro FETtec Mini AIO 15A Drone Electronics while the rubber tread resistSpecifications Brand: Holybro Item Name: FETtec Mini AIO Board Size: 29 x 29 mm Mounting: 25. 5 x 25. 5 mm Weight: 3. 6 g Holybro_FETtec_Mini_AIO_15A_Manual FC: KISS FC firmware F3 Processor (STM32F303CCT6 @ 72MHz (MPU6000)) Supply voltage 6 18V (2S 4S Lipo voltage) Dedicated onboard 5V BEC (max 1A) ESC: Active current limiting @ 15A Input voltage: 2S 4S High quality 30V MOSFETs STM32G071 @ 64MHz 128 kHz Motor PWM Automatic input signal detection