K1 does not need I-693. You will need the vac supplement filed out by a civil surgeon. I did not send the vac sup with my I-485 as it will only need be updated again before the interview. I am bringing mine to the interview with me next week. Remember, save copies of everything as you will need all the same stuff when you go to intereview, according to the department of redundancy department. I made out all of mu cyhecks to UCIS-but that was a year ago