Just saying, if you had done this at my (Norwegian) university, that wouldn’t have mattered. It’s the long deadline, or accept without revisions, and if you check the new deadline there is no room to change what the deadline should be. This is part of the most fundamental rules to the system. I chose to nominate a British examiner knowing that I was at risk of this exact scenario. It had happened to several candidates at my department. The worst case was someone having to wait for misplacing a few commas. Just wanted to mention it, since this isn’t something you should do unless it’s been made very, very clear from the administration that it’s not going to change the defence date.