well, looks like I got that one wrong then... I always thought V1 can never be lower than Vmcg and Vr never lower than Vmca was all I needed to know. I didn't get any indication of which I got correct and which I got wrong, at least not that I was able to find. I looked all over, and haven't been able to find a definitive number for max reduction though.. Vmcg made sense for me since on the 747 the lowest usable V1 we have is 123KIAS, which also happens to be Vmcg.. oh well.. live and learn.