Re: Sorry ladies! Not this time!
Surely you know the rules - the feminine suffix for professions is in decline more or less internationally.
(Incidentally, how about Feynman's earlier challenge - to build an electric motor that fitted into a 1/64 inch cube. He didn't think anybody would do it until an engineer turned up one day - and, said Feynman, he said to himself "oh-oh" as the first thing the guy brought out was a binocular microscope.)