Ted,
#1. It isn't my problem they waited until the end of their time to get the inspection. In my area, most buyers have 5 - 10 days to get the inspection.
#2. Remember, this is to just MAKE CHANGES, not for them to get the report.
#3. When I have made changes, they have been made within 24 hours, probably in 99% of the time.

I gave myself 5 days to allow for the worst case scenario when I wouldn't be able to get information I needed in a day or so. Never had to use that much time.