I'm having an issue with the ESC now. When I run 6s, once I go around 3/4 throttle, the ESC shuts down and goes into LVC mode (flashing blue light). This is strange as I can simply turn off the ESC then turn it back on, then it will run fine until I hit 3/4 throttle, then it shuts off again. I can keep doing this back and forth. This is only with 6s (not 4s). I've emailed ARRMA/Hobbico.
BTW, the 6s lipo or two 3s lipos are fully charged, so it isn't really an LVC issue. Unfortunately, they take 2-3 days to reply (USA), at least in my past experience.