Hey sorry about your WC rejection. I left that interview feeling awful and totally thought I would get rejected, but I got in. The interviewers were friendly but all ask very tough questions, and I wasn't able to answer all of them. I think what got me in though, was that I read their papers and asked really critical questions of their research (later found out that some of these questions were also asked by their own editors) and, where I can, I also ask about the potentially of this or that follow up research.