why don't you get a EZrun 80a esc. rated for 4s and has similar FET ratings as the MM, but has a huge fan on it, and a switching BEC that makes it run much cooler.
They say a good mechanic only needs 2 tools - WD40 & Duct tape. If it moves, and its not supposed to, duct tape. If it doesn't move, and its supposed to, WD40.
ive got a real mod1 mm from arthur (his personal) ive been thinking about selling it, it works perfect on 4s and 5s has all the caps, ccbec, and doesnt need a fan.....