Quark questions, mainly 6s performance

[lincpimp]

Was wondering why most seem to think that the quark is only good for 5s lipo and not 6s as the spec say. Is it due to the poor heatsinking or the internal components (fets, etc)?

I only ask I have a quark 125 air esc that I would like to use with a 1600 kv or so motor with mech brakes in one of my lsp truggies. Not using the esc brakes should take some of the load of the esc, possibly keeping the heat down?

Just wondering what the general concenseus on this is. I can always give it a try, and if it fries it will get returned!