Guacho,
Sorry for the delay, hopefuly is not too late.
The IO just told me at the end of the interview to wait outside for the Oath Ceremony letter. I waited for like 20 mins ant they gave me the letter with the Oath date just like 10 days after the 5 year mark.
My advise would be to go ahead and apply as soon as you can, the 5 year mark wasn't an issue on my case, neither was in my wife's case.
Good luck and let me know any other question that you may have.
