Pretty much the final call for me to bring any parts today. Although technically I can bring parts even if you told me on the day before 5pm, all it means if you don't tell me today is that I will spending valuable drinking time looking for parts that I could otherwise get ready today
Likewise with this last room. After today I can't guarantee that it will still be there (it probably won't), so even if you're sure, at least let me know today (or tomorrow) and I can at least get it provisionally booked for you.