747Focal,
I don't think much of your theory that, when one of the crew, at around V1, increased the EPR setting from 1.3 to (the correct) 1.6, he was simply correcting an earlier mistake. V1 being far into the TO roll, when he recognized the low power setting but at the same time intending to continue the TO, surely to God he would have instinctively firewalled the throttles to squeeze out the last ounce of thrust, get airborne and to hell with the increased wear and tear on the engines, exceeding calculated EPR, etc., etc.
Rockhound