Hello everyone, I recently got my first mamba stack, tried to flash C-H 40 Multi on my MAMBA F50_BLS using BLHelii S to change motor direction and the second ESC has the letter u assigned to it. Any idea how to fix this? If it is bricked, does anyone know how to unbrick my 4 in 1 ESC and how to find GND, C2D and C2CK on this specific board? Thanks in advance!