OMG !!! I thought the nightmare was over!
I got the first v2 MMM last week....ran it about 10 times on 4s and 6s configurations...not even a hiccup.
plugged the batteries in this mornng, turn on the switch...and ppffftt!
a small puff of white smoke comes out the side..and of course, it is done for
just came back from the post office.....oh, the agony