best tip would be to calm nerves down as much as possible. talk to people as you normally would, it helped me relax and I found i was able to connect with everyone at the firm a lot better this way. your assessors are just people, dont be afraid to ask them questions to show curiosity and get to know them a bit, you never know, you might have a mutual interest which you can then talk about (dont force this though or u might seem unprofessional)I hope I get an invite. Do you have any advice for their AC - was it more challenging than you expected?