Originally Posted by sjsamuel

I just set one up with the same equipment. 4525 520LE/hobby wing 120HV/vbar gov.
Left everything default except "very soft start"

Key things:
Pwm: 12khz
Timing: 15deg(some run lower but this seems to work well)

Both the above are default if I remember right !

I'm only 15 flights into this setup and 10 were mild as I was breaking in my packs. When I pushed the Heli HARD on one flight I had what felt like an esc low voltage cut off a couple times. Still investigating this. Im still not certain it was a setup issue vs a bad solder joint or something. Just letting you know!!
But for the other flights this thing was ROCKING!!! amazing power!!