I'm presently running a 43/51 combo (that is what you do when you don't have spare 42 & 52t rings) on the '61 Paramount with this FD. No problem whatsoever - works beautifully, and requires hardly any effort at all.

Come to think of it, Campagnolo was having problems a year ago developing a battery-operated shifting setup because of the power required to shove the FD upwards - I dare say a modernized variant on the rod mechanism would easily solve that problem.

-Kurt