Hi Red Comet,
I don't think the PMC will protect you from overboosting, as the manual clearly states that if you push full forward during take off (as in the case of windshear recovery), you will get overboost.
So, to put it differently:
is the reverse mechanism limited (as suggested by my colleague the other day), or does it allow us to obtain the same amount of N1 as in the forward thrust case?