What do you mean about hot motor? Too much Amp?
If i put 9L maybe I need more cells, to obatin the same performance?

But my first preocupation it's the ESC, my 9920 yesterday afternoon die. Some week ago starts to melted the plastic in BEC zone and I disconected and put an external receiver pack.
But hte plastic day by day contoinue to be melted and yesterday die, i check temperature and read 45ºC.

I'm not happy with it and now starts to find a bulletproff ESC.
Wich one recomended me? and where I can buy that ESC?

regards,

Enric