TrueRC 2X3S1P 5000mAh + NEU 1515 1.5D + MMM = FIRE!

[lincpimp]

I still think you had a weak fet in there and you gave it a decent workout and it let go. There are going to be some fet issues, just a fact. If the MMMs were not having widespread bec failures, the few smoked escs would just be chalked up to having a few dud components.

The battery excuse is crap, all you did was give the esc a workout and it let go. I did the same thing to a MM once on 5s. I have a 7xl in a buggy geared for around 40mph. I decided that I would try 5s and did not gear down. I got a rock stuck in the spur and the esc fried. I had griffinru look at it and he seemed to think that a section of solder got too hot and bridged 2 phases on the board. He seemed to think that there was a bit too much solder on there. So a rock and some sloppy solder work caused mine to fail, but it was probably getting quite hot from the overgeared setup too. A collection of things were at fault.