Note that there is a special way to get to 5301N. The 5th floor of Ingersoll is short and not connected to 5th floor of New Ingersoll nor connected to all of the 4th floor of old Ingersoll. Go to the hallway in the Old Ingersoll hall. Look for the elevator or staircase in the middle of the floor. Take that elevator or staircase up to the 5th floor and you'll be in the right place.