I have discussed the date with our factory lab manager.
The preparation work for the FAT setup is scheduled to complete by Aug 10th, however our lab engineers need a few days to test fire on mixtures, setup and prelim tuning before your client visit with you to the factory. Hence, they are concerned that they will not be prepared for your team and your customer, in case any errors or problems encountered on the test if happen during that week.
I am sorry for this difficulty, could you review your schedule and see if there’s another date that is possible for you and your customer?