E-Mike, I wouldn't worry about the MMM being rated at "only" 120A. Amp ratings doesn't really mean wnything when comparing car ESCs nowadays. That might sound low next to some other ESCs which are rated at some stupid figures, but the truth is, the MMM can carry a huge amount of power.
If it can handle a 1521 1D on 6S without a problem as Patrick said they tested with, then I don't think current-handling is going to be a problem in brushed OR brushless mode.
