Hello,
We filed on May 27th, and received AR status few hours after so i think it is by default too Potomac service center. And interview will be in Montreal.
We decided to not do K3 as we dont saw evidence its moving anything faster and dont want to risk to be transfered to California. I guess an opinion to reconsider in few months if we dont move at all. Will be great to see the difference between us and the K3 filers
Good luck to everyone and hopefully they hire more people to clear all the covid backlog !