The sweeper/vacuum runs at 5 mph and most of the time you have to vacuum multiple times.
If dust is a concern then the grass has be wet down before the grass is vacuumed. This makes the grass heavier which then requires multiple passes -- instead of just one.
If wind becomes a factor then the vacuum process needs to stop altogether until the wind dies down.
In the week of August 18-25 -- we will start laying sod on those areas that did not get covered. By early September we will be close to 100% coverage!