Wiggy ; I never got it, still don't. If you are going to reduce your power (we used to call it EPR) in order to increase payload (still don't get it), how much do you reduce ? Got any charts, figures etc ? And, you then want to "take off at Y plus a bit" . How much is a bit ? By getting a reduced V1, I am just beginning to acknowledge a increased VMCG but the rest of the argument has always left me very cold without specific charted info. Digging backwards through charts that give you an increased payload with reduced thrust is for the very brave. As you wipe out the ILS aerials, treetops and blow off a couple roof tops, have more evidence than "reduce" and "a bit", ready for the tea & biscuits.